Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9f9e8b4bf36414…

MALICIOUS

PDF

66.8 KB Created: 2021-01-29 08:29:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 42b7eb914bbdc3cb00a63783bca0330a SHA-1: 8bf86708a42108d1b5bd58da411ee580ff7fcbcf SHA-256: 9a9f9e8b4bf36414b25e5a9db1f661f1eb42db77a17badbba48bb112e5d07aaf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://leonvi.ru/aws?utm_term=phc+affidavit+form+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fe9792ccff7f.pdfIn PDF document text
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/9e45d352d0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_5fde5c783cf9d.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/gitavogivimekazaw.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/a3ff846c9.pdfIn PDF document text
    • https://gujejedadun.weebly.com/uploads/1/3/1/3/131398181/fiwep.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/165d784e5b62.pdfIn PDF document text
    • https://sezalufuveded.weebly.com/uploads/1/3/4/3/134389043/6e460171.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/taxisapawomadedakej.pdfIn PDF document text
    • https://rugovisatef.weebly.com/uploads/1/3/2/6/132682701/sanijop.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/metakibeme/lean_muscle_gain_workout_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/eater_of_worlds_guide_terraria.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/gumojulamarol.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/anamika_song_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nazafen.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_off0000c82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82A 5496 bytes
SHA-256: e2e92c9ff3d37519b8d27a77f85197db3b10cf29ee5a524edc0447bf6d209626
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10556 bytes
SHA-256: 59dc67e7269ea09c67433af438d6da50d51882d89cc935ab4eabb5a64a2bad25