Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d0a7adfe6ea575…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 19:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6eb2a59d3b36863a6918641e1d19a59f SHA-1: 5956dade5c7a892664fb2d8897715f9ae735a2da SHA-256: 74d0a7adfe6ea575e75be99bdd876fa9f4dcc80025bb81452aa02b1f7ca6d464
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 0.9998

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
  • 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://dugedepap.ru/wix?keyword=brooklyn+city+directories PDF link annotation
    • https://cdn.sqhk.co/wodabakope/jemgeDC/marketplace_mall_food_court_hours.pdfIn PDF document text
    • https://vitukotegow.weebly.com/uploads/1/3/0/7/130775282/vurasokalus.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/lGhvpih/fluffy_fall_fly_fast_to_dodge_the_danger.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/7334622.pdfIn PDF document text
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/wowusikivowaxonezipe.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/9028336.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/OCjffFd/40256380073.pdfIn PDF document text
    • http://mazezoda.22web.org/bonefish_mac_s_nutritional_information.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/lzih1X1/intersection_controller_game.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/joxesesopap.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/nedefi.pdfIn PDF document text
    • https://kiwogadewabinox.weebly.com/uploads/1/3/4/0/134017617/2941358.pdfIn PDF document text
    • http://gasufulezexe.22web.org/miraculous_ladybug_box_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_deb4cb3df5584439b147788c366d513a.pdf?index=trueIn PDF document text
    • http://dakokaxawizepu.epizy.com/swiftkey_keyboard_apk_old_version.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_466eef4742ec4c2fbbdd382dec2c87ee.pdf?index=trueIn PDF document text
    • http://sefibonep.rf.gd/combine_like_terms_to_create_an_equivalent_expression.pdfIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_a5b75339e64a4a92a25ede8e4b746061.pdf?index=trueIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_629dba9eaf404d6995025f7e3cb8b2d9.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85C 4936 bytes
SHA-256: aceb745514b7e09cd97af79cb9f369121fa06d28f3ce448476cb0951be8d2d2b
font_01_sfnt_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 10472 bytes
SHA-256: 9f94ac180d58f17ccb76bf0e16a1aa78b50c4ce27a569a31bd9e02e3279afc05
font_02_sfnt_off00011d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2D 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501