Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b75195e9540b40f…

MALICIOUS

PDF

40.1 KB Created: 2020-04-09 04:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 4a10c22252d59322f2975fe745056b20 SHA-1: 4fc16946598ff158272e517fa3e4dbea8f2e066b SHA-256: 9b75195e9540b40f117d1de729410e9f4d3e4700e32bdb0fa2ce9ca45eb05cd3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of SEO poisoning or a link farm, designed to drive traffic to potentially malicious sites. The document body itself contains a title related to a legal schedule, likely used as a lure. 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://iglootw.com/uploads/1/3/1/3/131383424/131383424.html#florida+uniform+permanent+impairment+rating+schedule+2017 PDF link annotation
    • http://eastmichiganeyecenter.net/uploads/1/3/0/4/130477372/xizasoveparo_tefobega.pdfIn PDF document text
    • http://mathiasotte.com/uploads/1/3/0/7/130739726/rewexemagebiza-julaforaz-kiwodudevoti-tebani.pdfIn PDF document text
    • http://euro-circuit.net/uploads/1/3/0/4/130488759/zowifujitifi.pdfIn PDF document text
    • http://kosmetik-barilli.com/uploads/1/3/0/2/130272071/rupozova.pdfIn PDF document text
    • http://egeriainc.com/uploads/1/3/1/1/131163514/xuradilasu.pdfIn PDF document text
    • http://exporux.com/uploads/1/3/0/7/130738711/bogizulovuvebivige.pdfIn PDF document text
    • http://silverapplesjewellery.com/uploads/1/3/0/8/130874516/fixipab-pegedavufeja-vexanovuzila.pdfIn PDF document text
    • http://biglittletaco.com/uploads/1/3/0/2/130272328/c6a346.pdfIn PDF document text
    • http://clairemontemmanuelkids.com/uploads/1/3/0/8/130814295/132816.pdfIn PDF document text
    • http://taraannejohnson.com/uploads/1/3/0/9/130969580/zesegajikudisuxu.pdfIn PDF document text
    • http://abovetumblerridge.ca/uploads/1/3/0/6/130603979/todulipo_jurozu_zurozejujuba.pdfIn PDF document text
    • http://millerfamilyadventures.net/uploads/1/3/1/4/131406361/pogedadaz.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: taraannejohnson.com 4 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000721a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721A 8704 bytes
SHA-256: a9ed96f07162c2e39a296ec01a4ea53b6c9f46aa2fcc8dfcfbd2520cfc2a1dad