Malicious PDF — malware analysis report

Static analysis result for SHA-256 42466ed9fc7538aa…

MALICIOUS

PDF

63.5 KB Created: 2020-03-28 06:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b9b9368cbe1c53615ed06ba4a805b436 SHA-1: d9fa51f63ee3cb289a946be868e82f836a1b9061 SHA-256: 42466ed9fc7538aa4d38171c2f0e54201ff046fdbd608cab19f544143e00b618
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attempt. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the document. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the distribution of links.

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://feel-well.org/uploads/1/3/0/2/130287989/130287989.html#d PDF link annotation
    • http://offgridhome.solutions/uploads/1/3/0/5/130546645/riwedadajun_sugagajaw.pdfIn PDF document text
    • http://alanajanebrows.com/uploads/1/3/0/8/130814980/remizokatid-kukelorewaxamex.pdfIn PDF document text
    • http://aligodding.com/uploads/1/3/0/7/130740356/5310808.pdfIn PDF document text
    • http://allurebundlesandmore.com/uploads/1/3/0/5/130541600/d808dfd04b68ac.pdfIn PDF document text
    • http://derjusa.com/uploads/1/3/0/7/130738639/takijalabox.pdfIn PDF document text
    • http://www.prestigedetail.co.uk/uploads/1/3/0/2/130288563/fazimuluv.pdfIn PDF document text
    • http://trashketball.us/uploads/1/3/1/1/131163760/4834501.pdfIn PDF document text
    • http://thatcleverthing.com/uploads/1/3/0/2/130273983/kabulalawo-bumejedel-sagananabinutij-dasidusalozaf.pdfIn PDF document text
    • http://composersoup.com/uploads/1/3/0/6/130605505/zizanawudo.pdfIn PDF document text
    • http://christchurchportland.org/uploads/1/3/0/6/130603941/zifanorase_velovozulimed_fiviki_mivuza.pdfIn PDF document text
    • http://hidingspace.online/uploads/1/3/0/4/130483331/7567383.pdfIn PDF document text
    • http://ourearthlab.com.au/uploads/1/3/0/8/130813849/lobofiji.pdfIn PDF document text
    • http://bindboard.com/uploads/1/3/0/6/130639377/72a003.pdfIn PDF document text
    • http://soulmatesandpassports.com/uploads/1/3/1/0/131070846/fa16697ab3e0.pdfIn PDF document text
    • http://faithfullyfitforlife.com/uploads/1/3/0/3/130323339/naboraziwive.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
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 7948 bytes
SHA-256: 7c5e3d0c3689ad2da2edc8a9146113c6ae7624e88a31e0d36babbeee60b0e18e
font_01_sfnt_off00007b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B66 29928 bytes
SHA-256: 883e2dd23059ee4b530cd0ff4efd9b8ef55f6b0826877a4912ef396e389a94cc
font_02_sfnt_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 16160 bytes
SHA-256: 2f79ba52acca039e5c354f09c372eb8b3e5c303dfc88b98fa2ec462876c681ba

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