Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ad322abcae2dd1…

MALICIOUS

PDF

76.1 KB Created: 2021-06-02 04:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 40cfbe1019777c6632ed78cff353b60f SHA-1: 4001756c44ce6ed6357a17712f9a1016466c39e8 SHA-256: 62ad322abcae2dd12100a65078a0e036f25374349bb5559512c69fcb647bdd8f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to drive traffic to potentially malicious sites. The ClamAV detection of 'Pdf.Phishing.Trojan' further supports a phishing or malicious content delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=etapas+del+desarrollo+psicosexual+de+sigmund+freud+pdf PDF link annotation
    • https://jikegasabum.weebly.com/uploads/1/3/1/8/131856907/nixubafifalevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_603d26f00c9fe.pdfIn PDF document text
    • https://vunabiripiboxuw.weebly.com/uploads/1/3/4/7/134756527/c61fbd0c4dd05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_603b1392b82c4.pdfIn PDF document text
    • https://gibelugexafop.weebly.com/uploads/1/3/4/6/134687098/2928146.pdfIn PDF document text
    • https://jasesagovog.weebly.com/uploads/1/3/4/6/134619134/6523576.pdfIn PDF document text
    • https://wojagezut.weebly.com/uploads/1/3/0/7/130775605/071ebc605.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/xavenokewix_lojebikigulavi_bilivow_xupazen.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/123189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_6015fda790012.pdfIn PDF document text
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/zifimesifirol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukagij.pbworks.com/f/zegubodotaw.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/atividades_sobre_pronomes_para_o_6o_ano_com_gabarito.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/41016471642.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/51292693486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157096cf-2ca1-46b3-b44f-1aabd3536544/76597191534.pdfIn PDF document text
    • http://labidan.pbworks.com/f/25202741623.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144418626/zuxupurisinilibalumese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40c4902-2f27-4d18-a5a3-34f592c92596/can_you_trade_options_on_expiration_day_on_robinhood.pdfIn PDF document text
    • http://mukonisu.pbworks.com/w/file/fetch/144446676/xedifurerasitamesuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c38d723-153e-47d5-ba91-86b0afc55d6c/what_is_green_revolution_in_the_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d0ee800-eed8-4cfa-83d6-90fa250afb70/oil_filled_heater_smell_delonghi.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_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 5500 bytes
SHA-256: 77129353d5243b90d680342f1638a590907dd3252783634efa2840ec4ba3117f
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 11116 bytes
SHA-256: e2c0bc705c7f60320b5f2418dd23648bbc95e96d15113581cb0618d72b78c9df