Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0b93e37aa95143…

MALICIOUS

PDF

74.1 KB Created: 2021-02-21 05:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e6eb44c146034212fe15cee57c8d2d4b SHA-1: f3d1bbcf9eb72846753cf1b14bdd3cabfe2142e8 SHA-256: 3b0b93e37aa951437c949720cb6c30a38ba7534c54965ae4861e180e4b505364
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirectors, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

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
  • 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.
  • 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://yafferge.ru/wb?keyword=where%20is%20the%20learn%20button%20on%20liftmaster%208550w In PDF document text
    • https://cdn.sqhk.co/gabisolovima/giZiiES/nba_2k20_myteam_cards_best.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/idjagjK/baixar_jump_jump_ball_2020.pdfIn PDF document text
    • https://nafepamozox.weebly.com/uploads/1/3/1/0/131070284/tababuvelod.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jfmiaif/6200875416.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/af6Yd7U/srs_prestige_west_melbourne.pdfIn PDF document text
    • https://kobafanosige.weebly.com/uploads/1/3/4/0/134016660/kefavijazugananujemi.pdfIn PDF document text
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/xapeme-bobafiledudu.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/8711348.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/tagewazebozafigeduj.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/6iagfhj/najiparabo.pdfIn PDF document text
    • https://jesofoxera.weebly.com/uploads/1/3/1/4/131407857/347d29.pdfIn PDF document text
    • http://kezujogorep.22web.org/ransac_affine_transformation_python.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1G4WQ8o/hallmark_channel_shows_on_netflix_2020.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/bubeto/sinekotunifiziriruvuxe.pdfIn PDF document text
    • http://fozugafunu.epizy.com/6198796600.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/different_attributes_of_form_tag.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/6647513396.pdfIn PDF document text
    • http://disomagugaza.rf.gd/5055145686.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/39610339011.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_off0000debb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBB 5712 bytes
SHA-256: 49ee37bade35fa281dabc8b8b78ab74bc73eecdcbfa80491797bd924baa745eb
font_01_sfnt_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 12660 bytes
SHA-256: d0c7551697e27a8af949f1220b4c1b1305dc6563d9a8401114e4da386a10e4f7

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