Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a290625d8349964…

MALICIOUS

PDF

80.2 KB Created: 2021-03-24 17:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1555eabd73a9e4c456e7a73219336e SHA-1: a2f9abf1e5e3f8f78e25b130985bf0ae607a3ff1 SHA-256: 7a290625d8349964110eb1f3cd7c5e845faf52b47b63e142e6e06a6fdad25ab1
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://botokaw.ru/aws?utm_term=marantec+m55+myq
    • http://dfds.in/mujer_que_sabe_latn_completowi1vg.pdf
    • https://wedufejaf.weebly.com/uploads/1/3/4/0/134018106/8018594.pdf
    • http://nanebaxexob.getenjoyment.net/how_to_find_tension_in_a_string_over_a_pulley.pdf
    • http://verifedform.com/tokozekimedugast9pq.pdf
    • https://cdn.sqhk.co/dabekojov/digPjd3/61257670385.pdf
    • http://help-service-support.com/83146096410ccnch.pdf
    • https://cdn.sqhk.co/guwezasov/jfgibvT/gikodotiwagolawekagadudon.pdf
    • http://banikomapi.22web.org/uc_browser_for_pc_online.pdf
    • https://cdn.sqhk.co/dogutadova/e7licjc/67595497146.pdf
    • https://cdn.sqhk.co/pulisamog/7gjaxkq/anime_studio_story_mod_apk_unlimited_money.pdf
    • https://cdn.sqhk.co/kosibowo/utjgpid/32073086644.pdf
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/megirupit.pdf
    • https://cdn.sqhk.co/wupifufexix/o5Dleya/dunupofazoguwufi.pdf
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/bavusegapu_jibebavukix_lekimirub_jodobavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dapizodipe.myartsonline.com/lusozudimowaxukuw.pdf
    • http://lefarobi.rf.gd/89665347481.pdf
    • http://mulozeraxepe.epizy.com/future_fight_comic_card_guide.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fd.bin
a84d813825a217e4b95f3adb2dcaa902d88e5aff3e03c22beacd84289b00e33b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 5092 bytes
font_01_sfnt_off0000f555.bin
15e291e63ab50a03f0717866601974fe733008591330e77d525529be2f2f4206
pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 12324 bytes
font_02_sfnt_off00011de9.bin
3c260b720ba846d87de456033c05b94d326aa9f09b16dabc19f167f97f6ae321
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 16204 bytes