Malicious PDF — malware analysis report

Static analysis result for SHA-256 5884beedd454ca58…

MALICIOUS

PDF

45.5 KB Created: 2020-04-03 13:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 3f330ea28840a8e392fe015eb5555392 SHA-1: 5e71274144651242546d0d81806145a47f1ad595 SHA-256: 5884beedd454ca58410ec45f1e48429602c8b242fec65530f697096f4655fd5e
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be SEO-optimized PDF files. This technique is often used to obscure the true destination or to distribute malware through a link farm. The embedded document body text mentions 'Hallmark card studio 2018 deluxe', which may be a lure to disguise the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://intertvfibraopticahastatuhogar.com/uploads/1/3/0/9/130969708/130969708.html#hallmark+card+studio+2018+deluxe PDF link annotation
    • http://treetopreptile.com/uploads/1/3/1/1/131163991/2a312.pdfIn PDF document text
    • http://eins-zwei-drei.de/uploads/1/3/0/8/130814237/6645912.pdfIn PDF document text
    • http://stealthlaptops.com/uploads/1/3/0/4/130436006/lipanemevifa.pdfIn PDF document text
    • http://thietkewebsitetayninh.com/uploads/1/3/0/7/130775109/82f35b5a3e85e.pdfIn PDF document text
    • http://powerslaveloft.com/uploads/1/3/0/6/130621965/tamev.pdfIn PDF document text
    • http://hstefani.com/uploads/1/3/0/4/130483454/natonan.pdfIn PDF document text
    • http://power3multimedia.com/uploads/1/3/0/7/130740524/2388285.pdfIn PDF document text
    • http://sgmurphy.com/uploads/1/3/1/4/131411197/1923002.pdfIn PDF document text
    • http://my-pet-outlet.com/uploads/1/3/0/4/130476944/welupeni.pdfIn PDF document text
    • http://raquelkdavisinc.com/uploads/1/3/0/5/130544352/6510150.pdfIn PDF document text
    • http://californiascuisines.com/uploads/1/3/0/6/130639887/1620032.pdfIn PDF document text
    • http://papilloneries.com/uploads/1/3/0/6/130604531/8dc1f60ae96.pdfIn PDF document text
    • http://hipsterleaks.com/uploads/1/3/0/5/130538870/xoxukupegulif.pdfIn PDF document text
    • http://ptmcc.ca/uploads/1/3/1/0/131070820/fepurefodixuxifot.pdfIn PDF document text
    • http://jerrygarciafoundation.net/uploads/1/3/0/7/130775156/kaliluvulusef-jotoro.pdfIn PDF document text
    • http://www.astroeatz.com/uploads/1/3/0/7/130775792/4ae88.pdfIn PDF document text
    • http://crockersgrill.com/uploads/1/3/0/4/130478819/guxidivamu.pdfIn PDF document text
    • http://gotwoodbytom.com/uploads/1/3/0/7/130740538/balogitewoniz-puguvizoj.pdfIn PDF document text
    • http://lwprojectsltd.com/uploads/1/3/0/2/130272848/3215193.pdfIn PDF document text
    • http://fingerfun.us/uploads/1/3/0/4/130490876/c9bed19.pdfIn PDF document text
    • http://lineagehemp.blog/uploads/1/3/0/2/130289242/248815.pdfIn PDF document text
    • http://linkyourbrain.com/uploads/1/3/0/6/130639356/f8ff7.pdfIn PDF document text
    • http://robertssale.com/uploads/1/3/0/7/130776699/5255899.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
🗂 Part of campaign: brooklyn-grace.com 7 samples

Related samples 1

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_off000085e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E3 8664 bytes
SHA-256: 4cc03286fe401f496390c4a507f69839d3338dc363d323ed4171ef5579f5c571

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