Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13a379a34d6a128…

MALICIOUS

PDF

36.4 KB Created: 2020-03-15 11:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a09c6e94705d486b0e555f212328a98d SHA-1: c77245ca94083d1b2a72f5423a6fa15f25e1337d SHA-256: d13a379a34d6a1286427d4858572b5869942a15a299e65bfa7c59fe96359f9f3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, http://pickmylotto.com/uploads/1/3/0/9/130969933/130969933.html#yellowstone+tv+show+imdb+parents+guide, is directly visible in the document body. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content or phishing sites.

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://pickmylotto.com/uploads/1/3/0/9/130969933/130969933.html#yellowstone+tv+show+imdb+parents+guide PDF link annotation
    • http://middleburyactors.com/uploads/1/3/0/7/130740116/d9bbb0b1ba2e.pdfIn PDF document text
    • http://therapeuticlearningcentre.com/uploads/1/3/0/2/130291724/betekotanakeruv_juwovafegekijon.pdfIn PDF document text
    • http://sternbarnard.com/uploads/1/3/0/4/130483963/junojane.pdfIn PDF document text
    • http://steamkeystudios.com/uploads/1/3/0/4/130488243/398c0dbd7cfa06.pdfIn PDF document text
    • http://www.walk-of-pride.com/uploads/1/3/0/6/130604516/tokeredililewujizira.pdfIn PDF document text
    • http://odazzitclub.com/uploads/1/3/0/6/130621893/788e039d1.pdfIn PDF document text
    • http://secondsolution.net/uploads/1/3/0/7/130738537/7366692.pdfIn PDF document text
    • http://hannifanrealestatebrokerage.com/uploads/1/3/0/6/130605133/8049822.pdfIn PDF document text
    • http://thedesigndevil.com/uploads/1/3/0/5/130539102/sapevomajiwojo_zavavilefol.pdfIn PDF document text
    • http://crisisupply.com/uploads/1/3/0/6/130639575/fizitivaf_makelijag_torafipok.pdfIn PDF document text
    • http://www.allisonrharris.com/uploads/1/3/0/7/130739926/c75f50cbdd1a.pdfIn PDF document text
    • http://theohmama.com/uploads/1/3/0/5/130589302/dulogakama.pdfIn PDF document text
    • http://www.poempanda.co.uk/uploads/1/3/1/1/131164372/pixore.pdfIn PDF document text
    • http://office-supp.com/uploads/1/3/0/8/130814052/d3d990b.pdfIn PDF document text
    • http://mail.converyinvest.com/uploads/1/3/0/3/130313531/jesuj.pdfIn PDF document text
    • http://www.vidovitagabrijela.com/uploads/1/3/0/5/130588989/zitekutoke.pdfIn PDF document text
    • http://neilestrick.com/uploads/1/3/0/8/130814143/vigufisoveva_poxiga_nubegutivilike.pdfIn PDF document text
    • http://jerryshardwarema.com/uploads/1/3/0/9/130969830/ganajekosutus.pdfIn PDF document text
    • http://choosekindnessmovement.org/uploads/1/3/0/9/130969182/7513929.pdfIn PDF document text
    • http://www.bottom-linebookkeeping.com/uploads/1/3/0/3/130379352/nibodadoxido.pdfIn PDF document text
    • http://bodywerksdetroit.com/uploads/1/3/0/3/130312998/12432232bdbc3b.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_off00006510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 7852 bytes
SHA-256: 91d61781c0e5287aa36d9303668cd46949221a17e3e4adca8f8e0101db454602

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