Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa84063d88933d3…

MALICIOUS

PDF

81.7 KB Created: 2021-07-26 03:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7ba8475ed203d2aca73126963897764 SHA-1: 9a743c4b738dfe11a1eecdbf66db00b26707d4a1 SHA-256: 6fa84063d88933d319fb8a0c488a369349a0354bef15ca9e9ad74c1e9a4d09b6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a link farm pointing to various compromised websites. These links likely serve as a lure to download further malicious content, as indicated by the ClamAV detection and ML classifier flagging it as a phishing trojan. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the malicious intent of distributing harmful files through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b67ff1649152a69dd85c66df5fea9af0/97475739540.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/de24ff7c02c7cb5862b0631f5e94aee0/pabisafaginupukenedufiga.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/1olg7u27qr7apu9g9mc286sjds/tukoguvowitidakifasupibu.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bcc052a1b---69380698417.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/285ea02327ef349961bcd06b0701a34f/wopiluko.pdf
    • http://faw-asia.com/image/upload/files/34785600349.pdf
    • http://speaklifeiamgreatness.com/files/files/figudi.pdf
    • http://preciz.com/uploads/wysiwyg/files/17045758916.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a950cc5029f---xidog.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e555a7f3eba---27172476144.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a15844ce5d8---10756651671.pdf
    • http://sevimticaret.net/userfiles/file/53726924735.pdf
    • http://ptaki.info/imgekoprojekty/files/jilipogedalatejem.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/vamuxezekamida.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc836fd1d---fusaminovew.pdf
    • https://guclupin.com/calisma2/files/uploads/pibagorikemijebefizeteg.pdf
    • https://chp-travel.ir/data/file/7002670335.pdf
    • https://jmcoverseaspvtltd.com/uploads/files/lajojum.pdf
    • http://xedaphcm.com/luutru/files/gukomet.pdf
    • https://vildmarksjagt.dk/userfiles/file/83967027217.pdf
    • http://assytekservizi.com/userfiles/files/18429857209.pdf
    • http://steakclubhn.com/campannas/file/wamedelupiwuzawikakukuzeb.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160781ed81a0c3---20522091728.pdf
    • http://vom-ragnaroek.de/uploads/file/rowizulivasijo.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3f949e3d---kuwuwevezunipotigibitaxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=kala+patthar+full+movie+online+dailymotion
    • 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_off0000d9c2.bin
81f23166daf6f8d45abc9c22a3598c2dd39e77cb2095596b36126f4f79ffe672
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 17504 bytes
font_01_sfnt_off00010780.bin
124adfd3e927a66018cd8cc2e94f7041d590bcb7fac130c1f09678d70c7bf609
pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10864 bytes
font_02_sfnt_off00012073.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12073 16792 bytes