Malicious PDF — malware analysis report

Static analysis result for SHA-256 e822a09dc9c16f09…

MALICIOUS

PDF

75.5 KB Created: 2021-03-12 10:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 099d67a84fba91407f9d1e619ccd7f1d SHA-1: 27be524ffc65bed86491e504badcd54b62b72564 SHA-256: e822a09dc9c16f09796eb1d9c9d31417473955374370a16f234b39408c565e78
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to disposable domains and potentially malicious content, indicative of SEO link farming and malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware delivery mechanism.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/wix?keyword=gas+law+problems+worksheet+answers PDF link annotation
    • http://bigops.fun/givesunuwevakajubexajezu5rxi.pdfIn PDF document text
    • http://waystep.site/sagafetemov1lbcd.pdfIn PDF document text
    • http://numulul.mygamesonline.org/english_conversation_dialogues_greetings.pdfIn PDF document text
    • http://reggis.info/local_maytag_washer_repair3h4e7.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/bixololusesajafinuresifo.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/42300033614.pdfIn PDF document text
    • https://parimuxuroz.weebly.com/uploads/1/3/2/6/132682994/8809733.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/f7cba9636508fd.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/3284917.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/2eedc1f0be.pdfIn PDF document text
    • http://skidki-day.site/ted_cruz_biographyaserv.pdfIn PDF document text
    • http://trylait.pro/when_did_the_galaxy_note_3_come_outea3a0.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/lomemafebuguduz.pdfIn PDF document text
    • http://startbastar.online/how_to_achieve_the_business_goals7n3b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_592e380fdd71454287e2075213b9486b.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_823294fa001d43b8a155a30bdd323435.pdf?index=trueIn PDF document text
    • http://noroved.myartsonline.com/riterowakobemizalifaremet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 5388 bytes
SHA-256: 918914e1b5352e9cad8d1b78786d4804420c6b7904d7a7605f135ac7879ec98b
font_01_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 10316 bytes
SHA-256: 11e5fecc4fc40f462c1a8865f9e32cff728208d6b56e88e41327d9b717584bb0

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