Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c197cf4d5f2d5b…

MALICIOUS

PDF

87.6 KB Created: 2021-03-03 23:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8c3a4d09da05fbf352f39cefd70a744e SHA-1: 9b5fcd2a78b0a5f01a87e6bba4680a24c4e5d753 SHA-256: a1c197cf4d5f2d5ba3782e76caafe1e65308cbae624832f335dff60a51504ec0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=o+que+%25C3%25A9+ingles+como+lingua+franca PDF link annotation
    • https://cdn.sqhk.co/sesizame/hbPjiii/jajesubakudov.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/eva_luna_novela_protagonistas.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/76041491966.pdfIn PDF document text
    • https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/melemizavuwatonibu.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/mamuzagiguvorufopafojuji.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/tsgexgh/dawewebe.pdfIn PDF document text
    • http://retamos.mygamesonline.org/the_lightning_thief_musical_soundtrack_list.pdfIn PDF document text
    • http://copyrighthelpcentral.com/what_is_the_best_starbucks_drink_to_wake_you_upb3yjm.pdfIn PDF document text
    • http://instapriz365.site/baldurs_gate_2_companions_quests0mti6.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/7058759.pdfIn PDF document text
    • http://copyright-infringement.business/bitsler_strategy_manualkxr11.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/VieOFgj/86380501245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/wuketotolu.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/45538812419.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/febugol.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/fobanedomoraruxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/expense_report_due_meme.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/clases_de_guitarra_por_internet_gratis_para_principiantes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001141c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141C 5496 bytes
SHA-256: 7c160945cefd33553fe798dfa24ab66d710bc420be21fac58f3414ee6a56ff71
font_01_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 13728 bytes
SHA-256: 14d4e1bcba779331abaf42fbe3cc31409d252956f845caa65423179eb89928f4

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