Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad22ac2922685b62…

MALICIOUS

PDF

83.0 KB Created: 2021-03-04 18:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 917f4373d229a5104da2e1af25a0798a SHA-1: 309c5c9e3bfbdf39a3415923a3422decb83f78dc SHA-256: ad22ac2922685b62dd86302c335acd169394dcf26b851848c51721ff5e41e9c0
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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. 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.
  • 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://fokemale.ru/123?utm_term=grade+4+math+textbook+pdf+ontario PDF link annotation
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/lepeva.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/ninonudu.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/is_it_too_late_to_plant_tomatoes_in_florida.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/xenyx_802_mixer_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff01e3ca463c.pdfIn PDF document text
    • https://bejamipoxef.weebly.com/uploads/1/3/5/3/135318713/4463909.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/8270998.pdfIn PDF document text
    • https://webezajafe.weebly.com/uploads/1/3/4/7/134774073/312a898612022.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/46727969972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454673/normal_5fee29ebc0e5f.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/lopirawokadub.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/planet_fitness_pf_black_card_worth_it.pdfIn PDF document text
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/3054776.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/gavexilatuvitaz/fenebolularokaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/how_to_install_flash_plugin_on_chrome.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_1b0a7317fa55411cb5236bd9c80e59e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/eau_guidelines_testicular_cancer_2016.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_c093e3b07eca41be888470a129ad6552.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/26424705195.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_4b260c7b54984d5a9b667e4b3f9942fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/goditisuxaradatijabujoj.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_off000103cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CD 5460 bytes
SHA-256: 3fe19eb5d1f2e640548050d17b43fd9a8eabce17ba0b2c9f8d752d35393c4c27
font_01_sfnt_off00011641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 11568 bytes
SHA-256: 8f398d99eee0148cde50ff8f455e65a57a58f2980c5fbbfd89c3a85e68af93df

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