Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d5bb93ceb6cddf…

MALICIOUS

PDF

77.3 KB Created: 2021-06-11 13:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 60c78a6d66d55da5fab1fea000780b9d SHA-1: 164756e36e285b6fad4aec862e45554ff6b24639 SHA-256: 63d5bb93ceb6cddf8133957333790775e7a1c3c12689c27b94639f0ddf78564d
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. The document body, though heavily corrupted, contains text suggesting it is a lure for 'Word 2007 download free windows 10'. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, likely serving as part of a link farm to distribute malware or phish for credentials. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=word+2007+download+free+windows+10 PDF link annotation
    • https://alexandrapanayotou.com/web/images/static/file/jisolarapetibuxitidiloso.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/feee111de045f86a770651fef83f0ebb/10975563089.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e7c2f6f1---47832001242.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/cnj8qb411ec1dgueju18juul75/58499946410.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4370791f1bfadc8786bde546ecce8bd0/268925416.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/dodivavuxawufife.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/28104334387.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609441865573e---sezezavowivomudoguxiwe.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/silaletebisuwalunazel.pdfIn PDF document text
    • http://webursitet.org/Files/file/kederinizinutin.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/89113947751.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/50811b6dbdba967ddb6e0e12a816cc58/fogiba.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/2bjr0nmos3o7ek4aujv265nos6/pilebaluratete.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f5451d780---1000360536.pdfIn PDF document text
    • http://amdind.com/userfiles/file/tonemuwa.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160797f7de96c5---varevolagowuwigizew.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a12fd66ca29---zinezivupege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 5412 bytes
SHA-256: f33e762cd2b2aac5c9bf93d217b649fb9d75d1cac556675643331f9a518b867b
font_01_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 10192 bytes
SHA-256: f03bfcaa29eeab512348959341c8eaa5b0fbe32415ffa286ab40a1d422eb9a00