Malicious PDF — malware analysis report

Static analysis result for SHA-256 babf49b9061a2468…

MALICIOUS

PDF

73.6 KB Created: 2021-01-23 15:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2692c76ed90de5664d4f7eddf55047aa SHA-1: 2ac816c7735763dc8d7a52e802cba8c3991a44d9 SHA-256: babf49b9061a2468d3fdb2383854c809de27f9df45b5ab4146c3b8572fcd04b0
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The embedded URLs suggest an attempt to direct users to potentially harmful websites, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm indicate a sophisticated attempt to manipulate search engine results or lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=android+phone+file+browser+for+windows In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_600a6980bae4c.pdfIn PDF document text
    • https://site-1195783.mozfiles.com/files/1195783/flip_a_coin_100_times_results.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gNTgihj/45013656562.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/27652152896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fe3e6611180b.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hegh63f/viral_video_tik_tok_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/hgfiigc/74395645963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fc7e3b59ea51.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/5854894.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/aZhiLjf/89938018889.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/titugome/40740882392.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/sifidagabalawafazikama.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/31985005710.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/kofijatefutu.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/cbse_ugc_net_november_2017_answer_key.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 5140 bytes
SHA-256: da7a2e9e68a6cb0bc5b7566e85bd294c7d052be6765b87bd70206a4db42f2965
font_01_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 11372 bytes
SHA-256: c4a2426cf2ca3ecd797b1b06649f230c76522a7806409ec5ea2bb1fcee100a22

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