Malicious PDF — malware analysis report

Static analysis result for SHA-256 122bbea0baeb8ea9…

MALICIOUS

PDF

39.2 KB Created: 2020-03-16 09:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3fcbec0fd541197cb3becff759f4e87b SHA-1: e3b72fc35bef6b59a3df019b7e0c243ddfd06864 SHA-256: 122bbea0baeb8ea95a758b7bd37383c10259d6ebf43a6267a25fa79304b5e629
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as a malicious screenshot lure, designed to trick users into clicking on embedded links. The document contains a large number of algorithmically generated URLs, suggesting a link farm or phishing campaign. One prominent link directs to 'http://www.prosolutionshomeimprovementgmail.com/uploads/1/3/0/5/130551576/sazisosarezival.pdf', which is likely part of the malicious payload delivery or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://8t2u0.salon225.com/uploads/1/3/0/8/130874378/130874378.html#husqvarna+automower+310+technical+manual
    • http://www.kirkcudbrightkennels.com/uploads/1/3/0/5/130589219/2908316.pdf
    • http://koalastats.com/uploads/1/3/0/7/130775701/c665e489f700.pdf
    • http://www.prosolutionshomeimprovementgmail.com/uploads/1/3/0/5/130551576/sazisosarezival.pdf
    • http://hostmaster.bellalunaconsignment.com/uploads/1/3/0/8/130814669/lejuxilov.pdf
    • http://coachingspraktijkdeverbinding.com/uploads/1/3/0/7/130775384/nizef_jivamejizat_suvanasuvo_bakegodixadono.pdf
    • http://automoto-usa.com/uploads/1/3/0/5/130547116/netuzotozoluzafe.pdf
    • http://harborfreighttools.org/uploads/1/3/0/5/130588216/3730738.pdf
    • http://cpanel.mallorynixon.com/uploads/1/3/0/6/130620560/cf99f6aeb0dd.pdf
    • http://www.exploreeasttennessee.com/uploads/1/3/0/6/130603690/nimeti-lepowu.pdf
    • http://webdisk.claudiademauro.com/uploads/1/3/0/6/130603851/97e1d95dc.pdf
    • http://sinohandicraft.com/uploads/1/3/0/8/130814873/1953111.pdf
    • http://www.buyboxblog.com/uploads/1/3/0/4/130488251/nawirigagafonam.pdf
    • http://captcush.com/uploads/1/3/0/3/130379529/tigit-dotixo-kubotefufamo.pdf
    • http://nannytherapy.net/uploads/1/3/0/6/130639273/warizawipegos-tofuse.pdf
    • http://hothousebruiser.com/uploads/1/3/0/6/130620637/c48ba8f15.pdf
    • http://crossfadeservices.com/uploads/1/3/0/5/130539325/3597913.pdf
    • http://admin.thegeorgeanddragonrowde.co.uk/uploads/1/3/0/4/130483799/2870115.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_off000079fc.bin
e14383757294bf255d81a0039960dcccde645a50f943034d489ceee466be24ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 5136 bytes

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