PDF malware analysis — malicious · 585619653312c460

MALICIOUS

PDF

170.9 KB Created: 2021-07-01 17:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 9ff109d6eeace2dd329312c956d2071d SHA-1: ab46630068d516e15093b94c6faa4e10bc9fb3fa SHA-256: 585619653312c460eef3e0505845cdec8bd26b4d23e535e88a1177090fa916dd

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the use of compromised infrastructure for hosting malicious files. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9cfac79281088fdd9aea4453958a720f/28168501969.pdf In PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077db5fbcc3e---fovitokujavawu.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71a42e686---5314421787.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c23c12d8b73e6377f4019c71cb7e4444/61729485697.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ac8cb11c---57690390308.pdfIn PDF document text
- https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/aanj5jdidnv9nhnspf05aipkj1/vokaratezovirogubi.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e98423a1f2b154c47fee62568111e9c9/6940486587.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa54a5920d---98582598345.pdfIn PDF document text
- http://bungefamily.com/clients/5233/File/lawepuj.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160948b5d82236---zekufaxesajisikaniwi.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b60f90dbe38---6257666665.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9hsvojnf9jm7mgru1sbka49862/98469421254.pdfIn PDF document text
- http://orosweb.hu/ckfinder/userfiles/files/sekejiwuzutogotufoma.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/t0uliaog2e7cph12ukh8350nb3/86834504132.pdfIn PDF document text
- http://oilandgaswork.com/userfiles/file/55038132590.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/84540759f7fd2cc3e03e9f0246a86af4/50875297033.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9620fa63e7---goluru.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/nisumejojivasikageru.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9bb4aa349---gufakud.pdfIn PDF document text
- http://eperon-kochersberg.com/img_db/87749456890.pdfIn PDF document text
- https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f94aa2dab3---65648425734.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc05e2e7d---75545228993.pdfIn PDF document text
- https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/b4eddf7b190f76251d354d1bf65dfc22/defebenakuriwabevirisik.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fire+emblem+three+houses+edelgard+supportPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00023f01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x23F01	17680 bytes
SHA-256: `2956b0272841f4fbaf017229c8ffb57888cd71bdebff78329cdf23f8216bd0b2`
`font_01_sfnt_off00026ccd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x26CCD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000284e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x284E4	10952 bytes
SHA-256: `a15ccef53cfdb3bbe08f33a797f5e1463a666e2708d6cd0050ef8f69e79a1864`

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