Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c19a0cdf7519880…

MALICIOUS

PDF

63.7 KB Created: 2021-02-22 21:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fbab710cb247128643da942f12e0ec8e SHA-1: 936fc5b31040612bb609892c80479a733bdcf5c6 SHA-256: 5c19a0cdf75198806473529cb9ba567ed94260e3d61e2898e999345215a0edc7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://druttle.ru/wix?keyword=mrs+potts+and+chip+tea+set+australia PDF link annotation
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/2013555.pdfIn PDF document text
    • http://prizinsta24.space/alliance_war_defender_placement_guidesw4vz.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/baxodujas.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/hdyEVlS/qs_world_university_rankings_by_subject_2018_countryfile.pdfIn PDF document text
    • http://batut.space/derinekobenajewewasbn7tz.pdfIn PDF document text
    • https://novatoful.weebly.com/uploads/1/3/0/9/130969934/2336319.pdfIn PDF document text
    • https://lubagevaruzazej.weebly.com/uploads/1/3/2/7/132712663/873cf.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/65590.pdfIn PDF document text
    • http://milanomoda-italy.website/learn_and_master_fingerstyle_guitar8m6m9.pdfIn PDF document text
    • http://drive4mclaneaustell.com/how_do_you_troubleshoot_a_12_volt_battery_chargerhfyul.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/sugosubexez/is_macbeth_controlled_by_fate_or_free_will.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/angry_birds_emoji.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/15723455058.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/dokovalawirak.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_off0000bb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB83 5168 bytes
SHA-256: 28a966063e213ed25e7851b83c59c768f91458db7cdc0f8ca35688ff343bbb61
font_01_sfnt_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 10868 bytes
SHA-256: 49c92a4830224f6e44edd37c3be7f30496d4c38869065807a3a785f151db7952