Malicious PDF — malware analysis report

Static analysis result for SHA-256 2503e56d2b534601…

MALICIOUS

PDF

45.8 KB Created: 2020-03-22 01:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ca052d6bd24c9eb2d10ade5769dc1f1 SHA-1: f93f89a97a0916c6392b5ae22c6eb1ab732e00a3 SHA-256: 2503e56d2b534601af4ee09b6f52742b714c47938aec095213d13563779cd4ab
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which follow a pattern indicative of SEO spam or phishing lures. The document body, though heavily obfuscated, contains references to 'Twilight illustrated guide' and URLs that align with this theme. The PDF_SEO_LINK_FARM heuristic specifically identifies the mass linking behavior, suggesting a malicious intent to drive traffic to potentially harmful 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://fundraisers-aylsham.com/uploads/1/3/0/5/130551094/130551094.html#twilight+illustrated+guide
    • http://silvapainters.com/uploads/1/3/0/5/130540146/mivukutelamo-wuzuzi-wixosif.pdf
    • http://escapethegulag.com/uploads/1/3/0/4/130476143/vatun-kowikek-pepevigawerexol-lozoku.pdf
    • http://tailorsportstowels.com/uploads/1/3/0/7/130738841/3742799.pdf
    • http://nashairporthotel.devsite-1.com/uploads/1/3/0/5/130588332/5869172.pdf
    • http://www.neverenoughstuff.com/uploads/1/3/0/6/130620603/6742095.pdf
    • http://locowebsite.com/uploads/1/3/0/9/130969806/308bfc115.pdf
    • http://residentiary.com/uploads/1/3/0/2/130273982/tadaroxelotej.pdf
    • http://goodbatterygurus.com/uploads/1/3/0/5/130545666/3114167.pdf
    • http://www.copelandco.org/uploads/1/3/0/4/130476310/bunizu.pdf
    • http://www.oregonadultcarehome.com/uploads/1/3/0/7/130740191/mupuxew.pdf
    • http://www.bnbcharleston.com/uploads/1/3/0/7/130776779/tolijuveb_dosakujejopajef_ragunirokiroruw.pdf
    • http://bluetecbeacons.com/uploads/1/3/0/8/130873794/latemukiruw.pdf
    • http://hostmaster.vitoshapartners.com/uploads/1/3/0/5/130550743/kupaz-jedejawozizi-wisozolatusu-vilitoterido.pdf
    • http://www.nusdive.com/uploads/1/3/0/7/130740033/vuzimulixel.pdf
    • http://scottvermeer.com/uploads/1/3/0/9/130969186/woguzovabexowavedana.pdf
    • http://www.davidbcarlisle.com/uploads/1/3/0/4/130488701/3889993.pdf
    • http://wecandothatma.com/uploads/1/3/0/5/130538922/4196592.pdf
    • http://eaglepizzeria.net/uploads/1/3/0/2/130272937/5601645531661d.pdf
    • http://olivialudwickart.com/uploads/1/3/1/1/131164229/1010041.pdf
    • http://autoimmuneguru.com/uploads/1/3/0/6/130604732/tufekaxujotawiz_wugezopelomatu.pdf
    • http://1972-1975mastermanalumni.com/uploads/1/3/0/6/130639891/750243.pdf
    • http://ofertasbogota.com/uploads/1/3/0/7/130738652/kuxinidajazujekize.pdf
    • http://www.thereikilife.co.uk/uploads/1/3/0/4/130475964/vemuwaguwigexaz-jasajatudese-kazepadumesi.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/6/130639358/2674292.pdf
    • http://astasira.co.uk/uploads/1/3/0/8/130814340/ca659316b.pdf
    • http://www.thereikilife.co.uk/uploads/1/3/0/4/130475964/vemuwaguwi
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d61.bin
9daa8d75b3487340ae5f2c197e007d970cde002865b5c270f7cb18d68aaf5b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 10156 bytes
font_01_sfnt_off00009ff6.bin
480437884ac0b6d9fcc812d03c56ed28f568666de2b30b44bd42ac9599fc2464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF6 2680 bytes

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