Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1c0ed76526b629…

MALICIOUS

PDF

33.6 KB Created: 2020-03-22 07:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e7af3147b24276c89484850ab7fba2ef SHA-1: 5b73b7132b1eb6f9cd9c22cd09ee3a83400f5186 SHA-256: 4c1c0ed76526b629695e1cd29260077bf4d33ebea822ee7c485fb4adf1e6c9fa
96 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, many of which are numerically or book-slug-based, suggesting a link farm or SEO poisoning tactic. The embedded content, though partially corrupted, includes a reference to 'Naomi Klein The Shock Doctrine Audiobook' and multiple URLs, indicating a lure to drive traffic to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious.

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://lydiarf-itness.com/uploads/1/3/0/3/130313186/130313186.html#naomi+klein+the+shock+doctrine+audiobook PDF link annotation
    • http://gabiworkshop.com/uploads/1/3/1/0/131070351/2816592.pdfIn PDF document text
    • http://herbalantioxident.com/uploads/1/3/0/7/130739564/sagamavamizan.pdfIn PDF document text
    • http://nationalartsclubaustralia.org/uploads/1/3/0/3/130379841/pibenukigit.pdfIn PDF document text
    • http://yziu6.bpmtc.com/uploads/1/3/0/4/130483573/jewasipewep.pdfIn PDF document text
    • http://www.pedalitforwardnwa.org/uploads/1/3/0/5/130589171/1206548.pdfIn PDF document text
    • http://nakedcoconut.com/uploads/1/3/0/7/130739499/6776609.pdfIn PDF document text
    • http://canariasmicasa.com/uploads/1/3/0/4/130483631/cb2add0546078.pdfIn PDF document text
    • http://www.khits943online.com/uploads/1/3/0/7/130739618/muwowe.pdfIn PDF document text
    • http://lisahatchmillinery.com/uploads/1/3/0/7/130738854/dimojodanomux.pdfIn PDF document text
    • http://wreathsby.com/uploads/1/3/0/8/130813332/534e6cf4ff6128.pdfIn PDF document text
    • http://049months.com/uploads/1/3/0/5/130550744/3447620.pdfIn PDF document text
    • http://www.steelcitysocialclub.com/uploads/1/3/0/6/130620431/xibimuzarisunatabow.pdfIn PDF document text
    • http://myrvtec.com/uploads/1/3/0/5/130589191/117087.pdfIn PDF document text
    • http://govindaskirtanband.com/uploads/1/3/0/4/130476976/zovalefugawuwazisetu.pdfIn PDF document text
    • http://www.philjeremypersonaltraining.com/uploads/1/3/0/7/130776166/memojufaminafofeweku.pdfIn PDF document text
    • http://lunacleaning.net/uploads/1/3/0/5/130539987/7477027.pdfIn PDF document text
    • http://channelingwithobrien.com/uploads/1/3/0/7/130776079/21e2f.pdfIn PDF document text
    • http://ctruin.com/uploads/1/3/0/5/130539188/876e47c300650b5.pdfIn PDF document text
    • http://www.baizcompany.com/uploads/1/3/0/6/130622011/panimipaxefozixom.pdfIn PDF document text
    • http://cayleymanorhomeownersassociation.com/uploads/1/3/0/5/130541944/nidusez.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_off00005bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAC 7172 bytes
SHA-256: a6168c1690d72461988ef6236aa5cc42302e058e496c5f51aac192e6ce39f962

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