Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0fa364f47428dc…

MALICIOUS

PDF

92.1 KB Created: 2021-08-03 23:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 269f809299eba2e301ae388aeb8c26a8 SHA-1: daa05faaa2193b68551c08bef9aaaa93549ea3aa SHA-256: 3c0fa364f47428dcf191129de422bcf42b9276e6fbf1c057d9b97a2c73443f14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised websites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://drafthe.ru/uplcv?utm_term=how+to+make+a+murphy+bed+without+a+kit
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c1583c046---75488167854.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d5b345c001158766aba85fa717710666/71135948516.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/n8f3574p31q85fai05mc06of2v/54638102848.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4f5b30c0caf6132072ead4133467d00d/wotetegurelunakexunogi.pdf
    • http://xn--eyt274i.com/upload/files/watotidaxonofirap.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb4c035024---zidusavititiwite.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0142a5bbcf0c2610cb3e4b7abe028071/52057593030.pdf
    • http://bkbflooringusa.com/userfile/abbey/file/tunameti.pdf
    • http://interwork.sk/userfiles/file/xorepiripalenevaga.pdf
    • https://sibconsulting.com/contents//files/tasolupofisiwebemubiku.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd757ca4f6f---buwemarirabelanekoril.pdf
    • https://arrayamed.com/userfiles/file/25082691475.pdf
    • http://everest-c.ru/ckfinder/userfiles/files/16557391185.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc787ad38a---lotemebis.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54f4e5bfd---naginamidudapunoxok.pdf
    • http://lor-rostov.su/userfiles/files/63560643814.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0cf1082b43646f33d80d6eebf56d4288/52957252276.pdf
    • http://spalovnachemolak.sk/userfiles/file/piwonetopalalepetolosel.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acda50d8151---kidutaneseradekipaz.pdf
    • http://barsugo.com/ckfinder/userfiles/files/nogipum.pdf
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/vexosoxafaniwodezujasazow.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b564189018---9186214347.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/3285937dba924f94230a098bd5fdab67/32342046450.pdf
    • http://pileshoppen.dk/userfiles/file/61036841058.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036d.bin
e0be666dc641067fad28134cf09997d544dde27ab2c59342a6118cf4d9ac80a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 17492 bytes
font_01_sfnt_off00013124.bin
0d10f06db552615ebf230264152e73f5322dfe12c8b767ed2f454e1ae9906426
pdf-font-stream PDF embedded font (sfnt) at offset 0x13124 10864 bytes
font_02_sfnt_off00014a02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A02 16792 bytes