Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6b7b7a50a530af…

MALICIOUS

PDF

77.4 KB Created: 2021-04-19 11:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c415568b5d68756c35b857f4b717892c SHA-1: d72c15d66bc0445e24effb48a1b99eccbc09fbd6 SHA-256: bc6b7b7a50a530afe413c4599b63067f5239ba66c246f01a3833905ed7d24b3b
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO redirectors and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary lure appears to be related to 'how to get dachshund puppy to sleep at night', redirecting to a suspicious URL.

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.
  • 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://pelibifir.ru/strik?utm_term=how+to+get+dachshund+puppy+to+sleep+at+night PDF link annotation
    • https://loratabupufedev.weebly.com/uploads/1/3/2/6/132695903/1748259.pdfIn PDF document text
    • https://gazutegib.weebly.com/uploads/1/3/5/4/135400758/2386843.pdfIn PDF document text
    • http://summ-ita.space/felotirerivituwuzixi4amfy.pdfIn PDF document text
    • http://sesalon.xyz/firajobefimo4gklf.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/canterbury_tales_prologue_modern_english.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/714fcee86.pdfIn PDF document text
    • http://cmb-accueil.com/16230781266rra2s.pdfIn PDF document text
    • http://eslife.pro/acer_laptop_power_cord_replacementwyymh.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/467132693.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/fokapikow/prentice_hall_world_history_the_modern_world.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/niluw.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/sonutaxidako.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/transformare_inch_in_cm_word_2003.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/80037037020.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/vuragezatudifu.pdfIn PDF document text
    • http://tujupifirafadus.myartsonline.com/42017246148.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/gixeguruwetudi.pdfIn PDF document text
    • http://fufuzadawefor.onlinewebshop.net/review_of_bilayer_tablets.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/88052957763.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/antologias_upn_tercer_semestre.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/12951834265.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/diwifubofixelu.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/2479158338.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/tamil_movie_caller_tune.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_off0000ef07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 5396 bytes
SHA-256: b120c874c7d9834fbc2227f3f37a707c91f7a0a946176a702a7f2cc7439ff370
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 11164 bytes
SHA-256: 3f20a535c61052796c6b4b50fbd441e0d56ecdae0e310954794b8d30b7afa687

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