Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d1f0b0d3fc50c0…

MALICIOUS

PDF

74.7 KB Created: 2021-03-06 11:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8433eaaf5b6193d8dce936d01e700207 SHA-1: 43e6d19b6d6f67f512a1fed1a3bb68767c50764c SHA-256: f1d1f0b0d3fc50c07e36ff5028619c740edbb08541d491c0e26481d11683dd38
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, suggesting it is designed to drive traffic to external sites. The embedded URL 'https://xezojetit.ru/aws?utm_term=why+is+my+frigidaire+refrigerator+so+noisy' appears to be a lure, disguised as a search result for a common query. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure and URL suggest a phishing or traffic-driving campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xezojetit.ru/aws?utm_term=why+is+my+frigidaire+refrigerator+so+noisy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414860/normal_60117f78d9b84.pdfIn PDF document text
    • https://rasofenetiko.weebly.com/uploads/1/3/4/8/134862321/dadox_basof.pdfIn PDF document text
    • https://wumibopoz.weebly.com/uploads/1/3/4/5/134511789/zeraso.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/ncis_the_river_styx_part_2_recap.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/29030b0.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/noveredozazanodojawujamu.pdfIn PDF document text
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/2999237.pdfIn PDF document text
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/6856485.pdfIn PDF document text
    • https://daxosunusopudom.weebly.com/uploads/1/3/4/5/134510034/soganulubirafuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_601af306bc66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6016f701cdfff.pdfIn PDF document text
    • https://gebawifu.weebly.com/uploads/1/3/1/4/131483167/sanavolawa.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/kotenu/bosch_shx68t55uc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/sound_effects_free_for_games.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_7ca6979e784845a6bcfbeaab020a2c6d.pdf?index=trueIn PDF document text
    • http://mugazukadum.onlinewebshop.net/the_magicians_netflix_trailer.pdfIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_b4343e606fdd49c6bca9d445e9bfce68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/jezobelodazelubewigabonen.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_851d5f2b359044618580ea4221cf202a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/yearbook_endsheets_ideas.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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 5404 bytes
SHA-256: ed5c02350cf9d798e13217c4484406c4b580fef2985a69ae024e7f237c0d6da1
font_01_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 10644 bytes
SHA-256: d2f37a9a7b0c973f25ac435d266140a3904e7abb9df3f326f4bf276ed4238488

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