Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55ab32042365f8f…

MALICIOUS

PDF

32.7 KB Created: 2020-03-14 15:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6c57367d8428f5aa341c1f22259ac801 SHA-1: 920d70e8577849adca488fa2a66f9841822afac9 SHA-256: f55ab32042365f8f4a509a1395c6394b8101724e065ea619ff89eae246a83c40
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, forming a link farm, and presents a deceptive lure related to 'BBC news software free for PC'. The primary heuristic indicates a mass of external PDF links, suggesting a distribution mechanism for malicious content. The embedded URL points to an HTML file which likely serves as a landing page for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://d5i81.slpny.com/uploads/1/3/0/7/130776060/130776060.html#bbc+news+software+free++for+pc PDF link annotation
    • http://shamanicsojourn.com/uploads/1/3/0/9/130969056/nurekasanek-nuwipabi-kakawipawedexam.pdfIn PDF document text
    • http://nordykeart.com/uploads/1/3/0/5/130540290/lenololomifa-rimowitepewotop-butulesojipe.pdfIn PDF document text
    • http://nutritionalcounselingservices.com/uploads/1/3/0/6/130639966/111e8e6923e.pdfIn PDF document text
    • http://www.woodencirclecreations.com/uploads/1/3/0/5/130539944/464fb54cc.pdfIn PDF document text
    • http://pthaddeuskruczyn.ski/uploads/1/3/0/8/130874156/4066176.pdfIn PDF document text
    • http://philkramer.net/uploads/1/3/0/6/130620436/459b2455c42a.pdfIn PDF document text
    • http://addcompassion.com/uploads/1/3/0/7/130738633/2165e9a6.pdfIn PDF document text
    • http://cuppagusto.com/uploads/1/3/0/5/130542907/rurasesun_gapufovur.pdfIn PDF document text
    • http://www.blaughs.com/uploads/1/3/0/4/130476248/fabejen-felalobaz-ruruvef-renezeneza.pdfIn PDF document text
    • http://missouricards.com/uploads/1/3/0/4/130483417/zozato_nekiwegudi_vulasijo.pdfIn PDF document text
    • http://www.illoso.com/uploads/1/3/0/2/130272361/4214855.pdfIn PDF document text
    • http://ashleymacdonald.co.uk/uploads/1/3/0/6/130621279/785d8a84c5b338e.pdfIn PDF document text
    • http://molecularo2.com/uploads/1/3/0/4/130435701/1083249.pdfIn PDF document text
    • http://kittyspsychicinsight.com/uploads/1/3/0/7/130775723/roludosixovotivobi.pdfIn PDF document text
    • http://raidiousdigitalcontentservices.com/uploads/1/3/0/8/130874073/fukiz.pdfIn PDF document text
    • http://www.daltongeorgeauto.com/uploads/1/3/0/7/130776082/962942.pdfIn PDF document text
    • http://w300ak.com/uploads/1/3/0/7/130739383/gujebofi-kezunofifap.pdfIn PDF document text
    • http://northwesternsoccer.com/uploads/1/3/0/7/130775683/ribakenen.pdfIn PDF document text
    • http://penninsulatech.com/uploads/1/3/0/6/130639700/sosiburibububib.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 6860 bytes
SHA-256: 1c0d661308e355294bd8180543feef16b418e1308e40b33db9e45f89fd8b276a

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