Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96a14fa8fa291fe…

MALICIOUS

PDF

80.1 KB Created: 2021-06-25 04:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c76f45e11b1f0c4b6b99c806fc7d0626 SHA-1: 1e0c279f0a9a06701a142986a2b65faa6da8cf51 SHA-256: a96a14fa8fa291fe0527b5f8a978abc2b786e6ecf68e5aa63f5b387b6c79564a
164 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It leverages a 'user manual' lure to trick users into clicking links hosted on compromised WordPress sites, likely to download further malicious content. The presence of numerous external URIs and link farms suggests a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=user+manual+nikon+d3200 PDF link annotation
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/c8ad2515bc16a7aa95f17cd4819c790d/kirudupavikuvoraj.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/numisineboxomoxoxedupetag.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/i4d0t90sjtc6lt6qdc4571jas6/xesinosilakorelilisaw.pdfIn PDF document text
    • http://ausafe.net/images/art/files/54078599320.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/98692328765.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f5c8391d6---tarowanupifevamixunevuv.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160786a5dce303---4464210007.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb1193727---tubatafer.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/78376370969.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/4100330096.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/lesexudakiwojalubezidi.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0a5770d1---wolowolotesuretara.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/86b3128cab28a056da1c299f53cff9ce/vepejixu.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a78d1b6024d---naxokokifipel.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/fosezejoxifama.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/3a79d643867b7e9af1c97c75ed2cac51/71537211765.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/chrkarqbnu0svkqq79l8nonnhu/67209826261.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/dipinixezexisoviwibo.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_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 5464 bytes
SHA-256: 5b4471835121eaf4a77e726677dc130be061b4b2102717f738246c3978ac211c
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 11048 bytes
SHA-256: 5d285d719a9215bb91eceba71ca4fc42f2b0c50ba684e94ae3483e1d68de5349

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