Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de0000b4d025962…

MALICIOUS

PDF

65.6 KB Created: 2021-02-28 08:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2a113c53e2fb7705aea67efbe137b64 SHA-1: b6c94b12312de22f021606572031228c26a3c7a5 SHA-256: 6de0000b4d025962cb5c858875ff0f27101787dcd6bfb0b65d5f52b109b84925
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm or SEO spam operation, potentially leading to phishing sites. The presence of external URIs and a PDF link farm heuristic strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/123?utm_term=sony+sa-ct60+sound+bar+not+working
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fd61ac2d3208.pdf
    • https://cdn-cms.f-static.net/uploads/4417643/normal_5fd33128a83bb.pdf
    • https://cdn.sqhk.co/zumedizojas/dKjbijo/gajuvuvagaxiwige.pdf
    • https://cdn-cms.f-static.net/uploads/4461232/normal_60300206b5e65.pdf
    • https://cdn.sqhk.co/nadetajagupe/jaQjgia/jugeri.pdf
    • https://javagakikidubat.weebly.com/uploads/1/3/0/9/130969576/9968190.pdf
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/puzazavixafog_nitiku.pdf
    • https://veworokog.weebly.com/uploads/1/3/1/6/131606039/zovufelupaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muwemivumazulax/60596469192.pdf
    • https://s3.amazonaws.com/risalenefazozo/utorrent_web_not_ing.pdf
    • https://s3.amazonaws.com/datarofapakil/commendable_performance_meaning.pdf
    • http://dezezefisimel.rf.gd/bemobi_mobile_store_apk.pdf
    • http://wofeduvep.rf.gd/party_of_five_season_1_episode_guide.pdf
    • http://jekabuwof.rf.gd/periodic_table_blank.pdf
    • https://s3.amazonaws.com/pidufozu/axial_flow_pumps_and_fans.pdf
    • https://s3.amazonaws.com/xukanomarexumu/33474002351.pdf
    • https://s3.amazonaws.com/tejuvonixag/update_instagram_app_apk.pdf
    • http://revikir.epizy.com/what_does_it_mean_that_the_2_strands_of_dna_are_complementary.pdf
    • https://s3.amazonaws.com/xetasif/curse_of_strahd_revamped_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d0.bin
167f11b609792f87bc74c7a1d500cbe51b75dbad33b2122bf4d91d0fb0ee6bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D0 5904 bytes
font_01_sfnt_off0000d70c.bin
3560c9b74b659c049a75f2222c8f397d7543f8d84eebfd3b6a8c714b9bc6b177
pdf-font-stream PDF embedded font (sfnt) at offset 0xD70C 10044 bytes