Malicious PDF — malware analysis report

Static analysis result for SHA-256 7446d5d8eb251c3a…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 09:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e352d468c657dd4c6aace0ed5b20b1ef SHA-1: 02f2d38e7509602941fabd915d666ad46a37e86a SHA-256: 7446d5d8eb251c3a6674a99d0a42ae40b16e67a9a057e9b7123532812467b6ad
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, many hosted on disposable domains, under the guise of an "Android app browser wrapper". The document's structure and embedded URLs suggest an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/123?utm_term=android+app+browser+wrapper PDF link annotation
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/8028592.pdfIn PDF document text
    • https://palarijebatexo.weebly.com/uploads/1/3/4/3/134338538/limugedatif_notikijojufa.pdfIn PDF document text
    • http://dujivodawalaxu.22web.org/fabonewapudulufusemove.pdfIn PDF document text
    • https://revoninutilira.weebly.com/uploads/1/3/5/3/135338282/e3028ed62.pdfIn PDF document text
    • https://jenogisemelo.weebly.com/uploads/1/3/2/3/132303080/45069e27c473.pdfIn PDF document text
    • https://bafewalu.weebly.com/uploads/1/3/5/3/135350628/dd6b16553f4059a.pdfIn PDF document text
    • https://zanubago.weebly.com/uploads/1/3/4/8/134886268/vunebupiwokupoj.pdfIn PDF document text
    • https://mujonuwamuvix.weebly.com/uploads/1/3/1/3/131383921/ratilevaz.pdfIn PDF document text
    • https://fajupumivut.weebly.com/uploads/1/3/4/1/134108914/7408817.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/madodokon_vakukizeje_biwejilexoril_konoka.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/jojek.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/rejuzobag-setakegivi-wusoxaz.pdfIn PDF document text
    • https://fixabewol.weebly.com/uploads/1/3/4/7/134711766/227044.pdfIn PDF document text
    • https://nezopubetuw.weebly.com/uploads/1/3/2/6/132681339/b4fd2508c91c3e6.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/dusupew.pdfIn PDF document text
    • https://xokizaneg.weebly.com/uploads/1/3/4/8/134886830/paxamupupofav_vazaregatarik_moxobukerag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/26058109600.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/joziridurade.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/2003_dodge_durango_for_sale_by_owner.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/nekitimisesumibiwasam.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/40424800278.pdfIn PDF document text
    • http://degedudu.rf.gd/buffalo_airstation_n300_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/chemical_changes_gizmo_quiz_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 4852 bytes
SHA-256: 76810b7a3dfe328bf3641b61d8275fd6d6bf19c30adec097a073f17b1a542754
font_01_sfnt_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 11108 bytes
SHA-256: 059b0fe7f378c093bf0934aebf4f587bcc2c621ac96047a0d5027c7826ac2aad
font_02_sfnt_off00011b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B80 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3