Malicious PDF — malware analysis report

Static analysis result for SHA-256 034f830230076c9c…

MALICIOUS

PDF

79.6 KB Created: 2021-06-05 12:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213beb69bace3db79db7535bc29cd6ff SHA-1: 02e74ad81047de268e772c24ba3b1e08b67be67b SHA-256: 034f830230076c9c874b5e666f8b562ee8cfd2a0df455d64bffb81d48895118d
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or SEO manipulation scheme, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the presence of numerous external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure itself facilitates the embedding of external resources, which could be used to host malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://medvor.ru/wb?keyword=how%20to%20become%20a%20paramedic%20in%20mexico
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/69488de5766265.pdf
    • https://static.s123-cdn-static.com/uploads/4369907/normal_60016c06cdf2c.pdf
    • https://cdn-cms.f-static.net/uploads/4369503/normal_601c6a6aa33a0.pdf
    • https://cdn-cms.f-static.net/uploads/4408599/normal_60331175aef24.pdf
    • https://cdn-cms.f-static.net/uploads/4452398/normal_60432c50e21e3.pdf
    • https://cdn-cms.f-static.net/uploads/4443357/normal_604222654dbfd.pdf
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/sexofexixiwazezi.pdf
    • https://cdn-cms.f-static.net/uploads/4451754/normal_6035b550d6ef5.pdf
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/41aa2d6d91240fb.pdf
    • https://kuledeju.weebly.com/uploads/1/3/0/7/130775905/jolakalot.pdf
    • https://cdn-cms.f-static.net/uploads/4482849/normal_601932c4e8f03.pdf
    • https://cdn-cms.f-static.net/uploads/4486772/normal_603ed156bc702.pdf
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/da87bd5ee9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9f61220c-9561-45f5-9fbd-d2310f11522f/lutapevepezagilitofebu.pdf
    • https://uploads.strikinglycdn.com/files/38f7ca8b-5956-42cd-90d1-e91ed810786f/99414016068.pdf
    • https://uploads.strikinglycdn.com/files/c2e3f07e-8cdf-41d7-891b-ce73c87b14f0/47499958355.pdf
    • https://uploads.strikinglycdn.com/files/3276b80b-c5e7-4e1a-9989-864116015d54/2000_ford_ranger_mpg.pdf
    • http://fulusivijomu.pbworks.com/f/telovupezet.pdf
    • https://uploads.strikinglycdn.com/files/443342a5-6d62-4764-9a21-56ea5f9ccfff/lunemusit.pdf
    • https://uploads.strikinglycdn.com/files/e028857e-2b47-45db-9a9f-092a70fabf5c/if_i_pass_a_home_drug_test_will_i_pass_labcorp.pdf
    • https://uploads.strikinglycdn.com/files/8583162a-e3cf-43e7-a81e-5a5f5968f830/92391311212.pdf
    • https://uploads.strikinglycdn.com/files/730b0535-3444-490f-ac5e-6a93b73ade03/the_motorcycle_diaries_2004_watch_online_english_subtitles.pdf
    • http://fokojifidesi.pbworks.com/f/lelekawagidu.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_off0000f974.bin
792d760d895e2c740f1e1482e50e237457175cee7452afa02816696a991a6561
pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 5268 bytes
font_01_sfnt_off00010b54.bin
e0824fcfbf92d8e2d87158ec71ceb0bd55b77beac6c5e5ecfa0352662471cf16
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 11048 bytes