Malicious PDF — malware analysis report

Static analysis result for SHA-256 450020b1c030cbb4…

MALICIOUS

PDF

51.2 KB Created: 2020-05-04 12:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e215f175eb5ac221bf3f020b86a67f52 SHA-1: 860d4d1d5ac3f947260f93af510a87d6f41682f1 SHA-256: 450020b1c030cbb4198e3ef92db39538ddac37b4126e5b7004b47e730963f521
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. One prominent link, 'http://onlinebossllc.com/uploads/1/3/0/4/130476054/130476054.html#report+login+issue+facebook', indicates a social engineering lure related to Facebook login issues. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the extensive use of external links and the specific lure text point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://onlinebossllc.com/uploads/1/3/0/4/130476054/130476054.html#report+login+issue+facebook
    • http://generationsrise.com/uploads/1/3/1/4/131410399/6239119.pdf
    • http://chapteronelc.com/uploads/1/3/0/6/130604642/476a6e7aeb.pdf
    • http://cell-mex.com/uploads/1/3/0/6/130620965/337524d81c.pdf
    • http://washerrepairservice.net/uploads/1/3/1/6/131606668/lezukijes_jifowegurit_fosik_dezutumiwixapo.pdf
    • http://triamantbluezone.com/uploads/1/3/0/7/130740117/resafadototitov.pdf
    • http://thesoutherngothiccollective.com/uploads/1/3/0/6/130620853/dc3b91.pdf
    • http://getmytattoooff.com/uploads/1/3/0/7/130776328/d54e63edad77bdc.pdf
    • http://catv47.com/uploads/1/3/0/2/130288864/fevavowosid_lalasug_monegulo_vofuxumob.pdf
    • http://heavenlywedding.fr/uploads/1/3/1/3/131384383/edc2794d14e3797.pdf
    • http://houseofcaduceus.com/uploads/1/3/1/0/131071117/9128084.pdf
    • http://fitnesstrackermore.com/uploads/1/3/0/4/130476012/kovowiduremurebe.pdf
    • http://thesimplestinstructions.com/uploads/1/3/0/6/130639521/wiwofimibenig-wisagubiwek.pdf
    • http://miranda-bewindvoering.nl/uploads/1/3/1/6/131606144/dosovipu.pdf
    • http://journey-of-truth-and-love.org/uploads/1/3/0/7/130739076/nawola.pdf
    • http://intriguingcleaning.com/uploads/1/3/1/4/131438114/rowebobaw-moxene-pewasopisofa-kidipulogus.pdf
    • http://eyool.com/uploads/1/3/1/4/131453321/42003718.pdf
    • http://renewair.org/uploads/1/3/0/6/130620228/1731793.pdf
    • http://crossoverleague.com/uploads/1/3/1/4/131484603/4d80bc7e.pdf
    • http://tonchairs.com/uploads/1/3/1/1/131164204/jeruparabiju-ruxurapomige-gitote.pdf
    • http://debtmyway.com/uploads/1/3/0/5/130544067/ece56c58.pdf
    • http://nbachurchbryant.com/uploads/1/3/1/0/131070847/f2e8f40cf22.pdf
    • http://headspacevials.com/uploads/1/3/0/6/130604871/1cdbd6f69a6b.pdf
    • http://spooktacularevents.com/uploads/1/3/0/8/130874133/jabowuxikegoku_xexekofexe.pdf
    • http://mistofhealth.com/uploads/1/3/0/7/130775970/0de452fb94e.pdf
    • https://kidshelpphone.org.innocenceindanger.Wenn
    • http://houseofcaduceus.com/uploads/1/3/1/0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00009aa7.bin
eae1bfa7aab21ce97217e2b0f07b91dd33535d4cd73402b7e8cda3264164cc88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA7 12368 bytes

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