Malicious PDF — malware analysis report

Static analysis result for SHA-256 be444e33b98cc2cd…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 19:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a03e37f12df842082608085b068ce122 SHA-1: 7164f808145205ff718aa248edb3043535eeaaec SHA-256: be444e33b98cc2cded5de911ef16d2b83de1e66da2df3a93c4db1e0c394fe442
156 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. 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 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://mezovuduw.ru/123?utm_term=google+login+in+android+app+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382186/normal_60107cc2165b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388608/normal_5fceb10f6da94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fddf99ca3c55.pdfIn PDF document text
    • http://50offshop.info/ingenuity_swing_and_rocker_batteries71asy.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/domadozesunafik.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/fulinu.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/kigon_rogaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fd3b9c25514a.pdfIn PDF document text
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/08c23b7cb3c3.pdfIn PDF document text
    • http://crawlmqyu.space/wapking_song_ringtone_2019m5asp.pdfIn PDF document text
    • http://kittyplay.online/959656133563k5d2.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/6678602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5ff34615278e7.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/gapivegek/corel_draw_x7_keygen_xforce_only.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/bhojpuri_video_gana_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/154518937.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_ae651764bce642afb36bbbc924db82df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ditiruz/28489416122.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/transjugular_intrahepatic_portosystemic_shunt_guidelines.pdfIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_c66efd2191a846268080af0e8ea407a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazesej/hp_photosmart_7515_driver.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_113a42d87fae4514ba127e6a10c81aa7.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_00ad4d65d06542b9a5826f6879ffab2b.pdf?index=trueIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_b5f4f26938594dc2a2f65073a8b290fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/guzowaneripoluved.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/ansys_hfss_installation_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 5200 bytes
SHA-256: fa47692a97344a04f43873349b67beb9387cc2a08f3969fbde3e074d7e42160c
font_01_sfnt_off0001057a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 10384 bytes
SHA-256: bacc788b0e88ba76cafa83504917ade06629b39ac703c1d25b270364cae47d65

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