Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79da16fa7d21f03…

MALICIOUS

PDF

40.4 KB Created: 2020-03-13 06:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 827fdcce8e8e156e5f2fda1b334c78d0 SHA-1: 58556711f23119e1a745a27003bcfce0767ed72e SHA-256: b79da16fa7d21f039602f75a24cb2527936b891235502b6d77b37b4418223c27
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a method to distribute malicious content across multiple sites. The document body itself is largely unreadable, but the presence of URLs indicates a likely attempt to redirect the user to potentially harmful external resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://www.virtualbas.net/uploads/1/3/0/2/130291624/130291624.html#degeneration+lumbar+spine+treatment PDF link annotation
    • http://calkdr.net/uploads/1/3/0/7/130776609/5471023.pdfIn PDF document text
    • http://alderearlycollege.org/uploads/1/3/0/6/130604562/wadaribetifeposoz.pdfIn PDF document text
    • http://njliupdate.com/uploads/1/3/0/3/130323527/jepem-dufofizone-movinejotigixe.pdfIn PDF document text
    • http://nhatrangpartytown.com/uploads/1/3/0/7/130739635/wodog.pdfIn PDF document text
    • http://www.bakedbythelake.com/uploads/1/3/0/8/130873807/zozekotamobiv.pdfIn PDF document text
    • http://www.sitmeanssitdoggiedaycare.com/uploads/1/3/0/2/130288551/7383798.pdfIn PDF document text
    • http://www.medspaonfifth.com/uploads/1/3/0/6/130621114/5706665.pdfIn PDF document text
    • http://allthingsluxeboutique.com/uploads/1/3/0/6/130604636/vavulutibe.pdfIn PDF document text
    • http://stgscentreleeds.co.uk/uploads/1/3/0/4/130488500/bf02709.pdfIn PDF document text
    • http://mta-sts.mx.ihrc3.com/uploads/1/3/0/6/130621436/0a34d663e.pdfIn PDF document text
    • http://www.dollartank.net/uploads/1/3/0/5/130539438/kidixidakivapigumun.pdfIn PDF document text
    • http://myberrygoodlife.com/uploads/1/3/0/4/130476572/suzuxujodita_wenate.pdfIn PDF document text
    • http://coffee-a-roma.com/uploads/1/3/0/4/130483617/sibexenuwu.pdfIn PDF document text
    • http://hostmaster.fly4fun.be/uploads/1/3/0/8/130874386/basuwidikigaba.pdfIn PDF document text
    • http://mta-sts.mail.geraldsandau.com/uploads/1/3/0/4/130435524/275085.pdfIn PDF document text
    • http://kellytruckingltd.com/uploads/1/3/0/7/130775588/f5bfd35f7819ec2.pdfIn PDF document text
    • http://mordyhandmade.ca/uploads/1/3/0/7/130775011/tizim-nokadeje-livutefeso.pdfIn PDF document text
    • http://kingscrownsdentallab.com/uploads/1/3/0/5/130550666/6402927.pdfIn PDF document text
    • http://biblechapteraday.com/uploads/1/3/0/3/130313434/paxijetokifagoj-zeberuruxuret-zabavogirotusa.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 2

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_off00007660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 7580 bytes
SHA-256: 1d09b04e686d8359dbe804e9af82c9cee0a8392c5fa973b8fb05a0c60382f14c

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