Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b87af76e054b8fa…

MALICIOUS

PDF

42.7 KB Created: 2020-03-29 21:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: a76e4fc83a1cb0a6d672713ea226c9e5 SHA-1: ca2f697f6020910bd96e17dfd3c8dc182145d1b3 SHA-256: 7b87af76e054b8fa3c83fac7c3a5f373f5bfca243c792ab602b2a06d49d3e88d
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded external links, identified as a link farm. While no specific script was extracted, the structure and heuristic firings suggest the document's primary purpose is to direct users to these external resources. The ML classifier strongly indicates malicious intent, likely for SEO manipulation or to serve as a distribution point for further malware.

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://lists.accordionapocalypse.com/uploads/1/3/0/5/130590043/130590043.html#tc+helicon+voicetone+harmony-g+xt+vocal+effects+processor+review PDF link annotation
    • http://sofiyacattery.nl/uploads/1/3/0/7/130776296/romegajapaberaf.pdfIn PDF document text
    • http://juliehimes.com/uploads/1/3/0/9/130969079/dosizi_fevegoguxix_tafami.pdfIn PDF document text
    • http://kristin-guttenberg.de/uploads/1/3/0/4/130483422/9ac54d350df.pdfIn PDF document text
    • http://scripturecc.org/uploads/1/3/0/9/130969565/9968437.pdfIn PDF document text
    • http://storyinalocket.net/uploads/1/3/0/6/130604694/6ea6bf1.pdfIn PDF document text
    • http://thethinkingeffect.com/uploads/1/3/0/3/130323465/1546fb48a8cab8.pdfIn PDF document text
    • http://aurawakening.com/uploads/1/3/1/0/131069869/kikuweroxalomuvumuvu.pdfIn PDF document text
    • http://meltoriginalart.com/uploads/1/3/0/7/130739240/7390653.pdfIn PDF document text
    • http://globalattractionproductions.com/uploads/1/3/1/3/131398368/nobosurubuninizijipo.pdfIn PDF document text
    • http://theclementcanopysg.com/uploads/1/3/0/8/130813317/lapafazonafozup.pdfIn PDF document text
    • http://independencebible.com/uploads/1/3/0/6/130604231/koluvefevu.pdfIn PDF document text
    • http://siobhans.space/uploads/1/3/0/6/130621349/pivomipeso.pdfIn PDF document text
    • http://paragonsolutionsselect.com/uploads/1/3/0/5/130588968/5027399.pdfIn PDF document text
    • http://righthandpa.org/uploads/1/3/0/7/130776148/pemedekefixasubenu.pdfIn PDF document text
    • http://paulcurryelectrics.com/uploads/1/3/0/3/130379067/voduxujix.pdfIn PDF document text
    • http://teamtodun.com/uploads/1/3/0/2/130289340/sozokeme_pogozinunukifax.pdfIn PDF document text
    • http://colorfulminds918.com/uploads/1/3/0/4/130489841/1702856.pdfIn PDF document text
    • http://grupocanela.org/uploads/1/3/0/6/130603855/pedivifepe_wokotelilumewi_pikorusitezidir.pdfIn PDF document text
    • http://elmcityme.com/uploads/1/3/0/4/130488483/5250196.pdfIn PDF document text
    • http://shiftingloyalties.org/uploads/1/3/0/7/130775282/muxifa.pdfIn PDF document text
    • http://clergytaxreturns.com/uploads/1/3/0/6/130620340/6367600.pdfIn PDF document text
    • http://josweddingchic.com/uploads/1/3/0/4/130483299/zomumu_wirij_rasapewedo_bagelitab.pdfIn PDF document text
    • http://wgdcnkk.com/uploads/1/3/1/3/131383384/1104292.pdfIn PDF document text
    • http://www.calyculin.com/uploads/1/3/0/5/130589160/lowij-mujuxipajosiwif.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: elmcityme.com 3 samples

Related samples 8

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_off00007aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 8128 bytes
SHA-256: 870879cd28c0d760378da950058ae2187c1416660e20eb4644a6c98f5cf6ee7e

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