Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f2fe3c30e03c1a…

MALICIOUS

PDF

35.3 KB Created: 2020-03-31 03:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4d862ded1c0a7abbebd13b629c9ea071 SHA-1: bf51e37f528790d5c7089406f14de3591c1c159a SHA-256: 13f2fe3c30e03c1aefccfeab49e168cdd4c15e5109e80237e87bac38acbbad9e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links likely serve to direct users to malicious content or to manipulate search engine results. The ML classifier also strongly indicated maliciousness.

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://lollytopbabies.com/uploads/1/3/0/2/130272978/130272978.html#comparative+adjectives+worksheet+grade+3
    • http://deeplyt.com/uploads/1/3/1/3/131383734/76998.pdf
    • http://sustainabilitybusinessmanagement.com/uploads/1/3/1/3/131384015/4980268231.pdf
    • http://lewishamvillage.com/uploads/1/3/1/4/131437425/4f685d9529274.pdf
    • http://elevitated.com/uploads/1/3/0/9/130969659/xumixakofexene_rusabimesupaje.pdf
    • http://warriorsbrain.com/uploads/1/3/0/8/130874055/dawojomezejevimivak.pdf
    • http://sycamorebuilding299.com/uploads/1/3/0/5/130550895/5760328.pdf
    • http://kenrictaylor.net/uploads/1/3/0/4/130476006/pululobif-vumire.pdf
    • http://synergymhs.com/uploads/1/3/0/4/130435638/1073846.pdf
    • http://crazycrackeromaha.com/uploads/1/3/0/7/130740318/03b8abfcdb5517a.pdf
    • http://santosmillworkcorp.net/uploads/1/3/0/6/130604633/2169786.pdf
    • http://pastorgregsitcom.com/uploads/1/3/0/6/130603916/4382ae98f8.pdf
    • http://capitolhillclubmembers.com/uploads/1/3/1/3/131380739/923653.pdf
    • http://mckinnonpainting.com/uploads/1/3/0/5/130551144/gikozel.pdf
    • http://nautifoods.com/uploads/1/3/0/6/130621206/wumifexidagi.pdf
    • http://vlechtatelier.com/uploads/1/3/0/7/130775506/pikawofowuzivofubog.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060fa.bin
dea5fd5b6a10a3467fcff9a465fef4becc8a7c77f9feb1fd8339cf5c1516696c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 8116 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.