Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac75a6f24c691e1…

MALICIOUS

PDF

83.7 KB Created: 2021-01-10 12:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fcf4b16059a88f14bc946e0beaaa10cb SHA-1: 64442ecf63c0cb30adbcc691768d4e3cda8ed831 SHA-256: eac75a6f24c691e16418a22226c162bce5fd1b9cfe35571da8418f12fc6afd0c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to lure the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://traffmen.ru/aws?utm_term=adrenergic+drugs+medicinal+chemistry+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f8ec30823acb.pdfIn PDF document text
    • https://wofudanizosaxig.weebly.com/uploads/1/3/1/6/131637209/moxogi.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/nogesugiruri_senoxebotop.pdfIn PDF document text
    • https://site-1168265.mozfiles.com/files/1168265/8292176642.pdfIn PDF document text
    • https://site-1168340.mozfiles.com/files/1168340/xitemusegonudutawij.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/sasiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_5fab8b79d153e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472185/normal_5fbbe745ebc84.pdfIn PDF document text
    • https://wuxotiwor.weebly.com/uploads/1/3/4/3/134335057/dibepokasigemuxuluki.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/eiKgcjj/tiny_ants_in_car_florida.pdfIn PDF document text
    • https://site-1176433.mozfiles.com/files/1176433/jateke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5ff05f139b6b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 5432 bytes
SHA-256: c29bdeb829f12cc737b1a472c5362fd92689591723551fdb420b463b6b6468d5
font_01_sfnt_off00010efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFA 10632 bytes
SHA-256: 017d34f0ab5926166a521da56f781b66acee9f79e0cca0b64097df7004883474
font_02_sfnt_off0001334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.