Malicious PDF — malware analysis report

Static analysis result for SHA-256 800885401eee4a41…

MALICIOUS

PDF

80.9 KB Created: 2021-06-14 14:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 186df5d394294e1a81fcdbce31687ac0 SHA-1: 8dbc390a39f56f7921eed52eb403ecaae193b359 SHA-256: 800885401eee4a41509752044613a437a19334627f68f7bf3bea95511220537f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crysiq.ru/uplcv?utm_term=cast+for+frozen+2 PDF link annotation
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607291aa89597---54506417364.pdfIn PDF document text
    • http://promador.pl/userfiles/file/95114032843.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a8e498b7b---mafefisik.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a6e94a045---bitetawu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d66v4p46cvrmtthcqlkqo5b8p6/bolulorofujanusawo.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/74346715625.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/e0ecb34e4462b799c10ae9dc033a79f6/demepeditadopafipe.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/189e835ebe35e0b5e2b98aa00f420110/wizoxetidalipavupimedeviv.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc130f65b---xewinidupemalomixebege.pdfIn PDF document text
    • http://mosjob.ru/images/file/widujijezab.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/7919496461.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788ad42f2c9---33938976797.pdfIn PDF document text
    • http://ahchala.com/img/file/jejemekaganon.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985a333638b---siwodo.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/29040b21207d45d2e4e94b5985366999/rajopapejidefalefi.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160816bcb83b7e---jukibemitevoburix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3e1a2cdc7331ab87b6ea0fad8939c1e6/xezadomelibigi.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 4672 bytes
SHA-256: 8d39206d4bd861ae95fe963c5a3844f1dff4604bc79dd1389e5ecc482ad43805
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 10648 bytes
SHA-256: c3ed4c0e92a54c78e137b363e7fe29b99c8db38ea091fb7dff71b5784893e960
font_02_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 16236 bytes
SHA-256: 2a60e354a7e7d97aa22580170f597f57ca2294f074f23e8f360b13f1f8b4a00d
font_03_sfnt_off00012837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12837 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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