Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2202b2ca1b9153…

MALICIOUS

PDF

47.7 KB Created: 2020-11-02 19:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f32b739c73bee8970d3a354174563eac SHA-1: 1e65925c5f3a18284b88ea462a10cd6c343f1c2e SHA-256: 8b2202b2ca1b9153b3c21542c29d364f1b391f3cecff0b0f446172fa973586ab
194 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 several pointing to known malicious redirectors and SEO link farms. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary lure appears to be a 'voting guide', which is a common tactic for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=girl+i+guess+voting+guide+chicago+2020 In PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/9ac3242.pdfIn PDF document text
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/715671.pdfIn PDF document text
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/zivijomu-petoniluxikukuz-tegelofusuwez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f87b838beefa.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/fegabugojirira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_5f9f444ad4013.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
    • https://s3.amazonaws.com/levovod/ielts_reading_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a1c0c7-08a1-41c2-8bbe-850ca27318f7/uzi_submachine_gun_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2aa0b8-2a41-49e2-be78-c904df7e6268/rth5160d1003_u_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/indian_constitution_amendment_act.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/astm_e8_tensile.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/14324754601.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/tabuxodigorenunuxoxinole.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/adp_payroll_calendar_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 5448 bytes
SHA-256: 63a0b4e7c73922827a61c03e60977583055aab8bc9378e57a1dcb633caeb9e28
font_01_sfnt_off00007f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F89 10556 bytes
SHA-256: 1c4e8ed8c0c15f08305cf8be9bac6d0725cf1e800c43172affee342d39fc485a
font_02_sfnt_off0000a396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA396 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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