Malicious PDF — malware analysis report

Static analysis result for SHA-256 10744075ccea54b1…

MALICIOUS

PDF

74.5 KB Created: 2021-01-27 07:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8307dbfa846ecba6725f251f22bf5a67 SHA-1: 47f21c3b188cfa672690fedc0cf7d5fcff636d22 SHA-256: 10744075ccea54b1c0fde96bd1cc3a9333a55da2db8c74babb84baa2fd587b8a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/aws?utm_term=questions+asked+in+college+interview+with+answers In PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/jinovagu-puwobe-dipukalinuboruf-jukefawenipuli.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/L3gcEr8/typical_premium_for_whole_life_insurance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fc828783cec3.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/ThfETHy/balls_bounce_lucky_break_bricks_games_apk.pdfIn PDF document text
    • https://moxuvobojivoz.weebly.com/uploads/1/3/0/8/130873852/8912342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fe1ac4fd05b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497356/normal_6001dab32687f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5fff339f6e014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fdac6167a07b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422906/normal_5fcc292c9dcc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476150/normal_60047ddf74593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_6001cf6be2816.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/fowonaxul/adobe_signature_password.pdfIn PDF document text
    • http://batefagut.epizy.com/basic_english_grammar_book_5_saddleback.pdfIn PDF document text
    • http://gisatazab.rf.gd/garatokufapilusededezuj.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_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 5476 bytes
SHA-256: 93b3a31e14bf72bc666f48da7df757674b235633ed12c7516ad1f6e8a1c44aed
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 10236 bytes
SHA-256: 402f5d76b1f634289f0289bc06083126e13251fe635fa6ce6043fbd02d6da80d

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