Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fc686299a5b935…

MALICIOUS

PDF

78.1 KB Created: 2021-04-09 02:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e8c2a160839512c543898af4e1f454 SHA-1: 5748f99d38d590c0b0b4f54686b2474626804fce SHA-256: 14fc686299a5b9352bef3c00da68ae8075abbd49c85d72bd9ab1dceb699ef227
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to exploit user trust by appearing as a helpful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=asus+rt-n66u+dd-wrt+vs+merlin
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5ffe8042845e9.pdf
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/sipirogonarezo.pdf
    • https://cdn-cms.f-static.net/uploads/4409798/normal_6015562a67066.pdf
    • https://cdn-cms.f-static.net/uploads/4405202/normal_5fda2df4ec550.pdf
    • https://cdn-cms.f-static.net/uploads/4392470/normal_601d6fed62709.pdf
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/6315c8d6d5a348.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_6025c48063af2.pdf
    • https://cdn-cms.f-static.net/uploads/4443362/normal_601a48e501510.pdf
    • https://cdn-cms.f-static.net/uploads/4457272/normal_60214d26d9a56.pdf
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5fdc6a90a6db9.pdf
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/vuzutupejodav.pdf
    • https://dujakoxuk.weebly.com/uploads/1/3/1/4/131483447/162feb3e487.pdf
    • https://cdn-cms.f-static.net/uploads/4401540/normal_604fa7b139631.pdf
    • http://xaraxag.mypressonline.com/56291551453.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ce4fcdc-611b-4c52-b925-97275c63f8d1/what_jobs_can_you_get_with_a_degree_in_supply_chain_management.pdf
    • http://dovunufesesiz.onlinewebshop.net/sajojati.pdf
    • https://uploads.strikinglycdn.com/files/c52f0ffd-a0db-48cf-8fc6-cce77cf269c4/boxoko.pdf
    • https://s3.amazonaws.com/gomaxod/nogeroboxojisebutuzi.pdf
    • https://s3.amazonaws.com/waxegatulo/downloadable_free_printable_multiplication_flash_cards.pdf
    • https://s3.amazonaws.com/jeduzizonox/13435262029.pdf
    • https://s3.amazonaws.com/xoxaneral/vozopunofinizijozipa.pdf
    • http://fazobelo.onlinewebshop.net/learn_to_draw_cartoon_characters.pdf
    • https://uploads.strikinglycdn.com/files/6eee3fb9-f4ee-4ab6-b120-0f3ee571fc46/what_video_games_are_appropriate_for_7_year_olds.pdf
    • http://jisijuvod.myartsonline.com/atividades_de_anlise_sinttica_perodo_simples.pdf
    • https://s3.amazonaws.com/legapatatezisa/vadizerejamewes.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_off0000f14b.bin
208151851594ec3931e66ab5562951429281c10a364c8abcc9a177d8f53c7a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 5088 bytes
font_01_sfnt_off000102a4.bin
67a5e77dc8f455a59ba4428443c75957c4c606a74b47845234f5f3962416bb2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 12364 bytes

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