PDF malware analysis — malicious · 6d2ed0ef31b96378

MALICIOUS

PDF

86.2 KB Created: 2021-07-30 21:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c4598848fd4607f05c3263e8e25542d1 SHA-1: b844890205d5c27f6eceef74efab7f269c7c0c91 SHA-256: 6d2ed0ef31b96378aa533edad112c69f77af9408893ceba0ac3e80ff1be22d42

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with a spearphishing attachment used to deliver a secondary payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

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.
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://huntic.ru/uplcv?utm_term=11th+physics+guide+pdf+download+sura PDF link annotation
- https://thietbivesinhanhhuy.com/asset/files/29392744117.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb60c55ebb---kanozuxikuxedomowewexega.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2rv5ccf4jjq3n6uuq6rqk1k5ge/tasapepujari.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/e94envv28g2s1hl6eklks32din/zefupabomikuzuziwiruf.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde07483e7---pejapekezudelidugibuxifi.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608565ab6cbbc---mudapubenebapi.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ccdch87i4v1p016ohser2fgjt0/jejuj.pdfIn PDF document text
- http://jts-electrical.co.uk/ckfinder/userfiles/files/5804054884.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/7poi8t82ef0pstq8g1ed9lpjsd/21602841812.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16079efce81c9c---talenelubig.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609618590eefa---rimimokitisikomumu.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j9qj09v3tkk6i7iq206pqqfc5c/72632541768.pdfIn PDF document text
- http://tks-forever.com/upload/2021/07/05/file/21350232990.pdfIn PDF document text
- https://kenadong.com/contents//files/84990248497.pdfIn PDF document text
- https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/hp1fe3kgfgvtrc17v3klpuhre8/36951868031.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9hd500haq2aob6hh689u6onvra/polix.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ja3koq2hv24lbmv1k62kl96hu2/68029345577.pdfIn PDF document text
- https://fceresources.com/ckfinder/userfiles/files/35210276485.pdfIn PDF document text
- http://happy-travel089.com/CKEdit/upload/files/24428085217.pdfIn PDF document text
- http://sxcec.org/userfiles/file/digodeziweda.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d58fd30225---9135379132.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2336492b4d---sulobawusitapadi.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094721979fcc---69158189611.pdfIn PDF document text
- http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/sozalojaripi.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_off0000ed75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED75	11152 bytes
SHA-256: `31e14882c6a789db97cee782e9d767108017b21f37b512eaa164cbf797c821e0`
`font_01_sfnt_off00010764.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10764	16548 bytes
SHA-256: `d1f96315ae1e0dacd4f91c6bc62e50646f9930d87d1b2fa2f861b1f771ec0e7c`
`font_02_sfnt_off0001321d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1321D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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