Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d39483576978bf4…

MALICIOUS

PDF

78.2 KB Created: 2021-03-12 11:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1288b53d9b13df470dc28a557dfceeaa SHA-1: 493cc0745599116b5b4581f61f2b3a724d692704 SHA-256: 0d39483576978bf4286231fa5962cb0884f62e1c0a2d176710ebe686f5109736
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, and is identified as malicious by ML classifiers and ClamAV. The document body, though partially corrupted, suggests a lure related to an 'Affidavit form qld work licence'. The presence of embedded URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/123?utm_term=affidavit+form+qld+work+licence
    • https://rulusekiraz.weebly.com/uploads/1/3/5/3/135322703/878678.pdf
    • https://zagarete.weebly.com/uploads/1/3/4/6/134687236/muxepazav.pdf
    • https://cdn.sqhk.co/nupozifulija/cA43YbM/geometry_dash_spider_challenge.pdf
    • http://ganitigusawev.mygamesonline.org/are_brittle_stars_starfish.pdf
    • https://cdn.sqhk.co/xuwadezab/ihAjiHB/52557464015.pdf
    • http://xorimomupajo.scienceontheweb.net/vitoleriwodenivot.pdf
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/0a09978505c213.pdf
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/e89878.pdf
    • https://cdn.sqhk.co/pigajifaw/hgbjfAx/iphone_light_meter_app_lumens.pdf
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/1858327.pdf
    • https://cdn.sqhk.co/xivorotil/Gpjfhjj/wizard101_death_school_pet_quest.pdf
    • https://zipakodexosif.weebly.com/uploads/1/3/5/3/135344546/vawufuweje_kepanowome.pdf
    • https://cdn.sqhk.co/gotakavapu/5gcjcji/ball_dropping_2020_live.pdf
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/xizawilo.pdf
    • https://kixasakuzejud.weebly.com/uploads/1/3/5/3/135347884/3ad4ca8de499.pdf
    • http://xakojudanek.66ghz.com/alchemy_meaning_spiritual.pdf
    • https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/bizifiwevuweturi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vaxesopubowutuf.rf.gd/agrahara_gold_application_form_english.pdf
    • https://uploads.strikinglycdn.com/files/34b65278-491a-4816-b247-e01293fa26b5/esl_writing_exercises_for_beginners.pdf
    • http://fojamemu.epizy.com/dolujinadepesoduvon.pdf
    • http://relogevavikidid.epizy.com/i_am_barbie_girl_song_320kbps.pdf
    • https://uploads.strikinglycdn.com/files/13b9dfd9-26a0-41c8-a8c0-337305023300/how_to_change_address.on_drivers_license.pdf
    • http://zazisuj.epizy.com/zebuveramazekomidatobodox.pdf
    • https://uploads.strikinglycdn.com/files/ebd33857-defd-49c5-9bf6-6f654aab3c35/baritone_ukulele_songs_youtube.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59f.bin
c20e522a7a07686c766f2cf2333eb87b5f4f0de8d296928e30bcff8a9dccbbeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 5320 bytes
font_01_sfnt_off000107bf.bin
c6db24d8c10cc1eeff4f52c2a124350d267238d7d5a3139f49c7d52cdf4a3aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 10500 bytes

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