Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4e91720c96c5e2…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 13:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a0ffec9c23fd74d99ff90dd5387c952e SHA-1: 2f888f0a5794277d398e9a48b6920c3cc48feccc SHA-256: cd4e91720c96c5e249f4d4c3bbbd4c9e9d2d640d9ba0e20674a5a22e3d3780fc
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a phishing lure, including a mass external link farm and a visual download button. The presence of a password archive lure suggests an attempt to bypass security controls by encrypting a malicious payload. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=how+to+hack+asphalt+8+airborne+with+cheat+engine PDF link annotation
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/c6c8528a2c84327.pdfIn PDF document text
    • http://masajsalonunuz.com/is_sonic_soft_serve_real_ice_cream_safe_during_pregnancyamysb.pdfIn PDF document text
    • http://mabay.fun/1286717902437ok2.pdfIn PDF document text
    • http://coloradocustomelectric.com/64836161611iu39l.pdfIn PDF document text
    • http://cybety.xyz/fujitsu_scansnap_ix500_directions7fk4v.pdfIn PDF document text
    • http://winoorama.fun/14367699846j0zy2.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/bifbXii/50439532394.pdfIn PDF document text
    • https://botabire.weebly.com/uploads/1/3/4/6/134629411/lukedamekemuxaf.pdfIn PDF document text
    • https://vanewuzopawibo.weebly.com/uploads/1/3/0/8/130814706/e0bca3eb2aa66f8.pdfIn PDF document text
    • http://fashion-deals.xyz/337673906197or6i.pdfIn PDF document text
    • http://good-production9.site/evinrude_25_hp_carb_adjustmentajutq.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/b0f94.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/JQjjieK/pixel_car_racing_unlimited_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/6hggfhp/kajibakedosobuvejibifa.pdfIn PDF document text
    • http://cardioactiveufficiale.site/chernobyl_tamil_dubbed_movied97e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/google_bug_bounty_reports.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_f569ec122d3940e18078147c1ff9b518.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/are_dewalt_xr_tools_worth_it.pdfIn PDF document text
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_b211c680d7264cbca6c1822288d0f7c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/84604399018.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_f3719b815460427fa77ea3b77ccd1913.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_ca206b6acb594cee85ca3b1a2f9838aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidazeze/how_many_electrons_could_occupy_orbitals_with_the_following_set_of_quantum_numbers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 5648 bytes
SHA-256: d142213b2e86834998ca56bbdc61445271e67e85a72c04c0f0709d77c6a9f5e6
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 2316 bytes
SHA-256: 374e1bc11049e2750aa53ff29b446c0e843747e6ee03840a29de6d159c99b266
font_02_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 11936 bytes
SHA-256: 873924f19a7b5a187563c22519b2df80835ea10e3e801e83f58b474fc589abc1
font_03_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16