Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf2c25716b200c5…

MALICIOUS

PDF

79.5 KB Created: 2021-04-12 14:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29307aab35b961bcc3f78aefcadc997e SHA-1: b993ce26460c97c6a34064f3c402d499e9d02800 SHA-256: daf2c25716b200c5a67ae38c7f074d7c617634221a03582a9b3f89b9dbee8b65
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://golowaki.ru/strik?utm_term=how+to+train+your+dragon+homecoming+full+movie+dvd+release+date PDF link annotation
    • http://mifopevoruroga.22web.org/pibuzufaj.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/5885896.pdfIn PDF document text
    • https://paruvinuj.weebly.com/uploads/1/3/5/9/135970142/piruzeti.pdfIn PDF document text
    • https://nowefatitabawev.weebly.com/uploads/1/3/2/7/132740181/ef47d77.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/468fadfce7e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/bloons_tower_defense_4_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b775316-45e8-40b6-afa3-7ae74cf2eb2c/37697542469.pdfIn PDF document text
    • http://viwoxogopuxad.rf.gd/66015894032.pdfIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_cb65de6e0a654a5da301b838b8a57a08.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_0004cabe279f482aa3bd2a4742ae9343.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/machine_learning_data_science__deep_learning_with_python.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/furerosibukebatewa.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/54053855684.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/41755596882.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/fewetajan.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/2743389682.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/can_faulty_ram_cause_overheating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af78357-396e-4fde-b801-40553124591e/contrato_de_arrendamiento_de_vivienda_sencillo_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/rukalaneruxasogekezixuge.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/zivareriwu.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_089815eb39d0481cbfd6fdf6c60cff4c.pdf?index=trueIn 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_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 5648 bytes
SHA-256: 9abf04de70c764a2d9f58d81e0068bc45ea5067fe73f335ddc21afcadde2c18a
font_01_sfnt_off00010762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10762 11320 bytes
SHA-256: 8dd837ba5faacf3766e0071305e77be3c903bff8308449bbb68800d68610de5f

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