Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da1cca3a46f0def…

MALICIOUS

PDF

37.1 KB Created: 2020-03-10 07:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 975f875eb8478a8efe91360f2531292b SHA-1: 3b0beb46651ad9e8fb1928a96ed839a311959fef SHA-256: 8da1cca3a46f0def067a072d6eb589b11992940214e610068659703659ed30f5
136 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various domains, suggesting a link farm or redirection scheme. No scripts were extracted from this sample, but the primary attack vector appears to be directing users to potentially malicious external content.

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://www.doyouartistry.com/uploads/1/3/1/0/131070904/131070904.html#solving+quadratic+equations+practice+worksheet+answers PDF link annotation
    • http://www.placebasedresources.com/uploads/1/3/0/5/130544672/7827091.pdfIn PDF document text
    • http://profipriorities.com/uploads/1/3/0/7/130739328/342cd8692e7b.pdfIn PDF document text
    • http://cookedwithhart.com/uploads/1/3/0/5/130550881/kepeva.pdfIn PDF document text
    • http://eatanytime.com/uploads/1/3/0/6/130621357/de4b80d6d6.pdfIn PDF document text
    • http://morocco-desert-sahara-tours.com/uploads/1/3/0/5/130551179/welujagonugile-torateligiv.pdfIn PDF document text
    • http://www.demolitiondownersgroveil.com/uploads/1/3/0/3/130324207/4778252.pdfIn PDF document text
    • http://www.mikevincentphotography.net/uploads/1/3/0/6/130640133/pated.pdfIn PDF document text
    • http://taiyangchengshalong.br3h.com/uploads/1/3/0/6/130604956/xememakepuvaboteg.pdfIn PDF document text
    • http://logos-intrapp.cityofdanville.org/uploads/1/3/0/7/130740522/tuzisawejuwovon_mirulesugolomo.pdfIn PDF document text
    • http://activeachievers.com/uploads/1/3/0/7/130775922/zefumisutivimigu.pdfIn PDF document text
    • http://tobysthaikaffee.de/uploads/1/3/0/7/130776425/a6d9b8515a40.pdfIn PDF document text
    • http://northwestlouisianaautomationgroup.com/uploads/1/3/0/6/130639710/5323943.pdfIn PDF document text
    • http://oakscorp.com/uploads/1/3/0/7/130739878/kezisuf.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: globelend.net 4 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_off000068ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EC 7780 bytes
SHA-256: b71fa3e04e1530c0966aa4878964e3596af8b897af538127cfea1a8f5033929c

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