PDF malware analysis — malicious · 49aa9ec195604f59

MALICIOUS

PDF

82.5 KB Created: 2021-08-15 19:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3f2a93d1b07cfec37c29ff1227feb9ab SHA-1: 414282360f793f1d4d837ccc9c42990dfda0da39 SHA-256: 49aa9ec195604f59d842802e60fede7cb0b0c6a1188f1cc3a105808745dbd524

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains a malicious payload. The presence of a visual download button and numerous links, some hosted on compromised CMS platforms, suggests a phishing or social engineering attempt to trick the user into downloading further malware. No scripts were extracted from this sample, but the overall structure points to a downloader or phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://garglob.ru/uplcv?utm_term=apostle+joshua+selman+messages+2019+mp3+download PDF link annotation
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f656530138c---9146940471.pdfIn PDF document text
- https://gamedunyasi.com/calisma2/files/uploads/gobovu.pdfIn PDF document text
- http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/5de9ea9e75cb37e1adc729734b5e54fa/vubufe.pdfIn PDF document text
- https://arichaindia.com/userfiles/file/75611898129.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac742859d04---banelozadegobipogefabum.pdfIn PDF document text
- http://barudan.hk/UploadFile/file/20210531205805985.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076193dec95d---73463017117.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7f05afbe2255af1a03e6b33008797bc5/31827018838.pdfIn PDF document text
- http://prograsifkalip.com/files/fubozuzugegimojaxexejasoj.pdfIn PDF document text
- http://starlightcelebre.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/ramokadonedut.pdfIn PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160987f07861ae---5035310596.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e0c9c407---fukixedurunobive.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0339a0f2---putexamav.pdfIn PDF document text
- https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/61ab88153c7cfd3978749bf7bd5a9638/28343617065.pdfIn PDF document text
- https://calmoinc.com/upload/editor/file/tosomegapexalenomisapi.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091899062273---4480117605.pdfIn PDF document text
- http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/nejoten.pdfIn PDF document text
- http://laboratoriodiprogettazione-ve.it/userfiles/files/funedu.pdfIn PDF document text
- http://ninda.vn/userfiles/files/12632759079.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160824cade9fb0---vigopipulolovejuli.pdfIn PDF document text
- http://walosports.cl/userfiles/file/wafesigukelelomiwoset.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/907b7eae92fbcdd7d41cc411f35f06da/tatafikekerorokiwebirim.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f78f5c2ec---22135783523.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/171e68903a5fad14ba4124cc05b057c9/10798202578.pdfIn PDF document text
- 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_off0000dba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBA8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3BA	16788 bytes
SHA-256: `dbec64bbe5e4d35538e001f79f463d29bab1cc56cf07754bfd9b214e1f396a76`
`font_02_sfnt_off00011f7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F7C	11576 bytes
SHA-256: `e38568059c8cd4fbf48478e44ec42b5eaee22564debf83779d250e35892f7feb`

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