Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56050c60846407a…

MALICIOUS

PDF

96.9 KB Created: 2021-06-03 05:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 820f701083c71fd95cc9fda8facb83b4 SHA-1: b0ae71508ae8e29fc05e7dd9e97a3bb1ebda8016 SHA-256: e56050c60846407a817b5bee1349838da4be0eb0fb337f0f9dd9bd20f3afa13f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/123?utm_term=commercial+lease+agreement+ontario+template+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5ff3e26245a5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_6006fa67f2df6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_60358657b5429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fd99eba29522.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/9066670.pdfIn PDF document text
    • https://fewewoxeluvatu.weebly.com/uploads/1/3/4/3/134338934/devuvulafede-gatijurelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466364/normal_6005f23a130c0.pdfIn PDF document text
    • https://roxoxadedetep.weebly.com/uploads/1/3/4/5/134520556/1596526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_603e2b697eb7f.pdfIn PDF document text
    • https://rajawanog.weebly.com/uploads/1/3/5/3/135320481/zofemonus_vunawoduvarolet_linomoxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_605500ac303bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fcb344879b43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5b5ed5-cc76-46f7-8133-9dc204d87ea5/what_episode_of_the_vampire_diaries_do_elena_and_damon_kiss_for_the_first_time.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/56209099621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349fe90f-0098-44bf-8d9e-d5f0eecdcdab/how_to_make_a_milkshake_with_oster_blender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d35ba0-8f07-4a1e-a138-ddfd8e640baf/10063551336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409f0d8b-d377-491f-a20f-75df16349e10/wuguvebezojugal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df58e30-277d-44e1-bf33-10155e6910ff/kotexewafuvogobepevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84565f7-0c3d-4f04-a7e9-0c6682f93685/sundance_cameo_spa_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42088c92-ad88-4e3a-a4e6-28eb1e5a1a63/dyson_wont_charge_flashing_red_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c487e09d-ef6a-485e-940b-da980d37f71d/how_old_is_benedetta_caretta.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144503793/xem_phim_tam_mao_phiu_lu_k_1996.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_off00013cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAD 5240 bytes
SHA-256: 60af6bd58b5e3e76859b9fb96f085147fe1e0b14b654083f50411e8dfefdb167
font_01_sfnt_off00014e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E63 11856 bytes
SHA-256: 5df0035fe8e03f04d999c1a87a31adfb1ef064f7283b742b3a2b89dbc90ee506