Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae894b4ad5912782…

MALICIOUS

PDF

77.6 KB Created: 2021-01-04 00:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 04f9678bf96f3cd99a002ba84d7efc93 SHA-1: 79a048f4d510794300a95f3c2cbc6f636e5f849b SHA-256: ae894b4ad5912782d8b3c3a721193a72160a8d93cf7f11908b97460996fa14ca
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external sites, many of which are hosted on disposable domains and identified as redirectors to malicious infrastructure. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or session tokens by mimicking multi-factor authentication prompts. The presence of multiple malicious links and the MFA lure strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=ccdc+22+pdf In PDF document text
    • https://cdn.sqhk.co/zenetofuma/aKghwgh/barber_shop_nyc_midtown.pdfIn PDF document text
    • https://roguvajodanuk.weebly.com/uploads/1/3/1/3/131379692/e563a.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/da1e8.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/kOgchih/race_to_270_scholastic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5fb712a9bbb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5feaf078df49e.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/2ib6tjh/birilirivujoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469101/normal_5fa46b5e8d685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5fef0ccaa2295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f9590f839f86.pdfIn PDF document text
    • https://vivimojegoduv.weebly.com/uploads/1/3/4/8/134890214/firilavenuku.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/mgcicjb/mystream_stream_games_donations_chatsworth.pdfIn PDF document text
    • https://womarunere.weebly.com/uploads/1/3/4/3/134315700/kovino.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/lk7haje/anime_x_wallpaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf25dd2-d26a-44de-b59c-344f4165266a/97895402254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd8af08e-762f-47ff-bcaf-d95d3babba7c/oscilador_puente_de_wien_lm741.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_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 4672 bytes
SHA-256: 349a42037ccef4182a174a466e6535e9f6c73ea2de426d33aadca3727e89806e
font_01_sfnt_off000101bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BF 12776 bytes
SHA-256: a772a659ae544cd14e1ce01be2205d5d47759f5530bb3b54da3bdf8f17cc2cc6

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